sound quality – How To Fix Headphones

We all talk about sound quality every now and then especially when it comes to our headphones, normally we care most about how good quality headphones that produce very high-quality sounds but still most people they do not realize how to gauge or judge how a good sound quality is. What Is Sound Quality? Sound quality is a combination of enjoyability, accuracy, loudness, and intelligibility of a sound that comes out from an electronic media device such as smartphones, portable media players, TVs, DVD players.. etc that can be Objectively and Subjectively measured either by humans or based on electric measuring tools. There are plenty of facts and perspectives that we should consider when we talk about sound quality, we should look at it from different angles because there is no one sentence describe the exact meaning of sound quality, and that's why based on my experience and research I've created this article for you about sound quality facts you should know that nobody told you before. Having that being said, there are plenty of people out there assuming that good sound quality is related to the loudness of the music volume being heard in the headphone, but this is not totally true. To simplify the answer, I can say that sound quality is defined by how we preserve the clarity of a sound, its mix, and mastering subjectively. How Can We Measure Sound Quality? Sound quality can be measured in two different perspectives: Subjectively: This depends on listeners' experience to gauge and measure the sound from a media source and how they react to it either positively or negatively. Objectively: But for this perspective, sound quality measured by special tools used to gauge the accuracy and clarity based on electronic solutions. To go a bit technical, in objective measurements, the sound quality depends on different factors that electronically can be measured such as transient response, frequency response, THD and IMD distortion …etc. Such factors related to sound quality but taking the measurement results in this way is very similar to measuring a car driving experience by objectively measuring the horsepower, speed, oil levels, petrol levels .. etc, so as you can see, objective measurements won’t provide accurate results for us as humans since the results are coming from an electronic device perspective. Should We Judge The Sound Quality Only Subjectively? Yes as a generic answer, because we consumers don't care how the manufacturers gauge the sound quality of their products i.e. headphones from the perspective of machines, we should look to it from our own perspective only by how we preserve the sound listening experience. Linking that sound quality question back to headphones, measuring a headphone sound quality is relative, of course taking into consideration the headphone production quality like the branded ones mostly you can tell they have a better sound quality, but for normal or low priced headphones, you can gauge that by comparing its sound to some other branded headphones by listening to excellent music quality, played by a very high-quality media player source using corded headphone. NOTE: If you want to improve the sound quality of your headphones or earbuds, you can check my other article 15 Hacks To Improve The Sound Quality Of Headphones & Earbuds. But since we as humans have different perspectives in general, gauging a sound quality differ from one person to another, some people judge the quality based on the audio bass, others judge it based on the clarity, and in the end, there isn't that much right or wrong in that, as long as the user is happy and comfortably convinced about the sound quality he is getting out of his headphone or speaker. What Are The Sound Characteristics? Sounds are characterized by: Pitch: Pitch is referred to as how low or high a note is being played by an instrument or being sung, thus the pitch depends on the frequency of the sound. Loudness: Loudness is what we call the amplitude of a sound, and that's why when we listen to a low amplitude music piece, we intend to increase the volume of the player to make it louder and more energetic. Quality: This is what I was talking about which is referred objectively to the quality of the sound waveform from an electronic perspective and referred to subjectively as how we preserve and experience it. NOTE: Quality of a sound also depends on its waveform, for example, if you play the same musical note using two different instruments you will not hear the same sound, because those two different instruments have different waveforms, thus having different sound and quality. What Is A Sound Frequency (Audio Frequency) means? A sound frequency (technically) means a periodic vibration over time whose frequency is audible to average humans and it's measured by Hertz (Hz), the change of the frequency waveform over time will describe what a sound pitch is. Another characteristic that a sound frequency is depending on to produce a sound is the amplitude, which is measured by decibels (dB) and determines how loud the sound is, in a sound frequency waveform, the amplitude is measured vertically compared to the frequency waveform which is measured horizontally, the higher the dB level of amplitude the louder sound it produces. NOTE: An audio file with a dB level of more than 0 dB considered to be distorted and totally uncomfortable to hear, normally the gauge is in negative dB and has a maximum of 0 dB for maximum loudness with no distortion in the sound. What Is A Frequency Response? Frequency response is a range of frequencies on the spectrum consists of bass freq., mids freq., and treble frequencies. Those frequencies elements are controlling how the sound pitch and amplitude should sound like. What Is The Best Frequency Response For Headphones? From a headphone's perspective, the wider the frequency response a headphone can offer the better for that headphone. Frequency response is one of the elements that can enhance the sound quality that a headphone can produce, how? because of the audible frequency range (20 Hz - 20 kHz) as explained below: Headphones Evolution: Early back days when it was hard to get a headphone with a wide audible range of frequencies, but today, very basic headphones are covering the audible range (20 Hz - 20 kHz) and even wider than that. Bass Frequencies: Many headphones nowadays provide a wider frequency range than what we can hear as humans, some are providing ranges from (5 Hz - 33 kHz), I know this sounds crazy because as stated above that the audible frequency range is from (20 Hz - 20 kHz) and we shouldn't hear above or below that, but to be more accurate, headphones can deliver a sound that you can feel at low freq. (from 5 Hz - 20 Hz) more than you can hear at such very low frequencies. Pitch Frequencies: It is very rare that people can hear high frequencies above 20 kHz, but sounds above that value do impact the sounds we do hear as harmonics. The sound is comprised of waves that interact with each other at all frequencies. In conclusion, a frequency response impacts the sound quality of a speaker as well as headphones, but you shouldn't worry about that because most of the headphones are covered with the right frequency response. What Sound Frequency Could A Human Detect? The sound frequency range a human being is able to hear is between (20 Hz - 20 kHz). Above or below this range is not audible for humans, unlike some insects or animals like dogs, cats ...etc who have a wider frequency range than humans, while devices could detect any frequency ranges. Most of the headphones today are made to work in a frequency range which is far than what we can detect, so the manufacturers are assuring that full human being capacity being covered in their headphones performance, for example in headphone's description you will find the frequency range is working on between 18 Hz (Lowest frequency which serves the bass) to 22 kHz (The highest frequency that serves high pitch sound notes). NOTE: Do not be confused about the numbers, remember there are Hz and kHz, (Hz) is a small frequency cycle over time while kHz is 1000 times more cycles. For example, if you see your wall clock seconds indicator, a 1 second time equals 1 Hz (this means the lowest frequency), and imagine if you have 1000 Hz during that 1 sec, then you gonna have 1 kHz. I hope you got it I know it’s a bit technical. What Is The Best Sound Quality File Format? The best sound quality file format is the uncompressed format like WAV file, there are other file formats that are near to the quality of WAV files which you cannot feel any difference, but they are compressed without a quality loss like FLAC, ALAC ..etc. WAV files stand for (Waveform Audio File Format) has almost the best quality for people who want to enjoy high-quality music, because there are many other audio file formats that are also great in their quality and uncompressed ones but they are not popular to be used for consumers as they are not playable by smartphones, portable player .. etc but they are used in studios or production houses. NOTE: Most WAV files. FLAC or ALAC files don’t support metadata such as the album or artist name like what you see on mp3 files. You need to know that the master digital copy of the highest quality audio file saved by the mixing studio engineer is a WAV file, which is pretty huge in its size but excellent in quality, then the musician-artist produces his audio CD album from that WAV file source. NOTE: Original Audio CDs are a very high-quality media source, so if you are willing to gauge your headphone’s sound quality, then better to listen to an original audio CD using a good player. What I mean by “Original” is what you buy from the market, not the one that you create as an audio CD based on your mp3 files. Based on the technology demands for smaller audio file sizes over the past decades, an MP3 file format (which is the most popular) has been developed to serve the best audio quality with the smallest file size, the MP3 file format is a compressed lossy file format that has less quality but for an average consumer its a pretty decent quality audio. NOTE: Changing your audio files for example from MP3 to WAV (low compressed format to high uncompressed format) will not show you any enhancements to your sound quality whatsoever only the file size will be increased because you are creating an uncompressed file format based on a bad quality compressed format. As a conclusion for this question, regardless of what audio file type you have in your computer or other devices, you won't see that much difference if you are using average headphone quality with a normal PC audio card to listen to them, thus you need a professional setup to gauge the differences. Headphones Or Earbuds For Better Sound Quality? Both headphones and earbuds are offering excellent sound quality, although there are some differences between them in terms of how they deliver the sound to your ears and what they can offer as a technology solution, let's break this down for better understanding: Noise Cancellation: Most noise-canceling earbuds tend to be less effective as noise-canceling headphones unless you get a high priced pair. For headphones, they have also very good noise isolation especially for low frequencies but not all headphones offer this feature, and in most cases, those types of headphones are pretty pricey. For this point, headphones win. Noise Isolation: This describes how well sounds are being isolated and the people around you are not being annoyed by the music you are listening to. Of course, earbuds with a good pair of silicone or foam tips have the best isolation compared to headphones. Earbuds win here. Low and High-Frequency Ranges: Also known as frequency pitch range, which is usually explained as the lowest sound of a phone can transmit followed by the highest. At this point, earphones tend to have a smaller pitch range compared to headphones, so headphones win here (there are exceptions). Frequency response Curve: In other words, this could explain how much distortion an earbud or headphone produces, in general earbuds able to produce more distortion than headphones. Headphones win here (there are exceptions). Bass Boost: Here comes the main advantage with headphones is that they deliver superior sound quality when it comes to capturing bass tones. Earbuds tend to deliver inferior sound quality when it comes to bass tones or bass boost. 😁 Headphones win. Comforts: This is where earbuds tend to suffer, the reason is related to the variation in the cavum conchæ shape (The little bowl shape outside of your ear canal) in every person, so earbuds normally made as one product for all, thus making it in many cases irritable and uncomfortable to wear, on the other hand, headphones are a better solution for this regard because of them being over-ear headset can be used with any external ear shape or size with no issues. Definitely, headphones win. NOTE: If you are facing earbuds falling out issues while walking or jogging, better to check my other article 15 Hacks To Stop Earbuds From Falling Out While Jogging. Wired and Wireless: In general wired headphones or earbuds produce better sound quality than what wireless ones can give, I have declared all details in the below next question. Wired headsets win. In conclusion, both headphones and earbuds having their own pros and cons but still, they can deliver excellent sound quality, however, which one to choose depending on the circumstances and on your needs you can decide which one to go with. NOTE: You may check my other article in detail about the comparison between headphones and earbuds. Wired Or Wireless Headphones For Better Sound Quality? Also, some people are asking "Do wireless headphones reduce sound quality?" It's a pretty common question people are normally asking. Wired headphones are gaining benefits by using your media device amplifier and its power, simply because they are using the electrical cord connected to them, which is practically and logically better than the small amp inside of a pair of wireless headphones. As a general answer, I could say based on my research that wired headphones tend to provide a better sound quality experience compared to wireless ones, how is that? because wireless headphones are basically using Bluetooth technology which is based on AAC file format, as well as many wireless headphones are based on the SBC codec. So a wireless headphone's sound quality depends on two stages to deliver the sound from your media player to your ear, the first stage is where your player uses different types of audio files that are based on different codecs and format while playing a file from your player's list, the music sound will be compressed in order to be sent over Bluetooth technology to your headphone's set. On the other side, when your headphone receives that compressed signal from your media player, it will decompress the signal back to a music piece that could be transferred to the speaker to play it out. During this process, the sound quality will be less than the original audio file on your media player. Comparing this process to a wired headphone it is simply using the media player amp to deliver the sound with no compression via a voltage signal. What path does a sound take to reach your wireless headphone? Media Player > AMP > Coder (Digital To Analog converter) lossy > .... Bluetooth Medium .... > Wireless Headphone > Wireless receiver > Decoder (Analog To Digital Converter) lossy > Your Ear NOTE: Wireless headphones technology are being enhanced every day and the manufacturers are working to better enhance the wireless technology. What path does a sound take to reach your wired headphone? Media Player > AMP > Wired Headphone > Your Ear Because of the importance of this topic to many people out there and since most of them prefer to use wireless headphones as a new technology that makes their life better, I want to proceed further into this and give you more details so you won't be disappointed in the comparison I described above between wired and wireless headphones. NOTE: If you are facing issues pairing your wireless Bluetooth headphone you can fix that by checking my other tutorial article 19 HACKS TO FIX BLUETOOTH PAIRING PROBLEMS – ULTIMATE GUIDE. In addition to WAV files, CD-quality audio tends to have the best quality, and mentioning AAC for the wireless headphones above was based on many users are listening to iTunes music (which is AAC based), and since the fact that AAC is not as good as a CD-quality makes things worse for those who love the listening experience using a wireless headphone. But here is the thing, Bluetooth technology is still and will always be evolving, there will always be enhancement into the wireless technologies just as happened in the past when they created different file formats and different codecs for different purposes, the same is happening with the wireless or Bluetooth technology, and definitely, we will not see this over days but within a long time. NOTE: A new codec is being cooked under a small fire called aptX, this codec is intended to reproduce or meet the CD-quality audio while using wireless headphones, but nobody knows when this codec sees the light. In conclusion, If you are using your smartphone or media player to play music to your wireless headphones you won't see that much difference in quality compared to connecting a wired headphone with a dedicated DAC (amp), but if you are an audio quality geek, then better to go with a decent quality wired headphone with a good media portable player, playing high-quality music files will make your day. Does Headphone Impedance Affect Sound Quality? Yes, headphone impedance is directly related to sound quality, but before I can proceed further to say how we need to understand first what does headphone impedance mean? All electrical devices have three basic elements that without them being together there wouldn't be something called an electrical circuit, thus no complete definition of electronics, those elements are Volt, Current, and Impedance (measured by ohms Ω). So, since headphones, smartphones, media players ..etc are all electronic devices so they are based to function on those three elements including the impedance. NOTE: Impedance from an engineering point of view is meant to be the resistance of electronic material (like a cable, metals, or any electronic elements) that adds resistance against the Current in a closed electrical circuit. Now I don't want to go further in technical stuff as I am not intending to make a tech blog, so as long as impedance is one of the factors that any media device or headphone are based on to function, alternatively, a headphone's performance also based on its electrical circuit impedance by default. So how does headphone impedance affect its sound quality? There are two types of headphones, High-impedance, and low-impedance ones, low impedance ranged from (5 Ω to 32 Ω ohms), and from 32 Ω ohms and above should be the wide range for the high-impedance headphones, below are the differences and how they impact the sound quality: High-impedance headphones: Offer more dynamic levels of sound quality and adding new dimensions to the music you are listening to, making sounds smoother and enhanced, plus they offer a better bass definition. NOTE: Normally high impedance headphones are commonly used at recording studios for mixing and editing sounds and music at a professional level. Low-impedance headphones: Offer less dynamic levels of sound quality, hence can get either too tinny or bassy with Higher distortion levels especially at high volume levels. NOTE: Apparently, headphones with high-impedance keep the integrity of audio files much better than low-impedance headphones. As well as with high-impedance headphones you can expect more balanced, clean, and less distorted sounds, especially at louder levels compared to the low-impedance headphones. What About Media Devices Impedance? Does It Really Matter? Do you think only headphone impedance is what we should be concerned about! No, it's not the only parameter determining the listening experience, we should be concerned about the other end where the media players and smartphones are. Both headphones and portable devices output impedance need to have a certain type of numerical relationship to one another to provide the best sound quality out of both. NOTE: For more details on headphone and media devices impedance you can refer to my other article 15 Hacks To Improve The Sound Quality Of Headphones & Earbuds along with other informational details. What Factors Impact Sound Quality? We can talk a lot about this subject because it has different directions and perspectives in order to give you a wider overview of sound quality and what factors that might either impact it negatively or positively, but let me brief you with some points just to increase your awareness while you're still here at this facts article. And I am not gonna talk about side way information like big room will affect the sound quality or distance between the sound source and our ears, I am gonna go deep further into information you might not have even thought about. Mobile Voice Call Sound Quality Being a Telecommunications engineer for many years in my career in different fields, I am giving you this tip for free 😀 which you might not hear commonly but it will enlighten you for sure. It is really complicated how mobile phones are communicating with each other, it's not as simple as you think like they are communicating directly, no this is not correct even if the one you are calling is sitting just right beside you. In reality, (I am being so brief here) any two mobile phones are communicating between each other via a mobile switch through a long-distance network of different technologies used and solutions such as but not limited to GSM towers, fiber cables, microwave links, BTS, MTS, MSC ... etc back and forth. So, in order to make things work, mobile smartphones are using two different technologies to make a call starting from the signaling process to check the caller and the called mobile locations and accordingly using signaling to make a connection between them, then the telephone rings, once the called party answers the call, an Audio Voice Channel is established between the two parties and the call has begun. Starting from the Voice Audio Channel establishment (where my point is), the communication between your mobile and the other party through all that long way is based on the mobile system technologies, which requires to reduce the voice quality in order to reduce the delay time, as well as reducing the bandwidth capacity of the network to handle more calls at the same time at the optimal quality (this also has different approach technically), this will reduce the cost for the telecommunications company service provider and increase their revenue from your subscriptions and data payments.. etc. NOTE: What I mentioned above is really brief information on how to make a simple phone call which takes around 1 second to be established along with many other detailed procedures. Now, how the voice quality will be reduced? it is basically cutting off frequency ranges from the sound waveform (like we talked previously about "low-frequency and high-frequency") and narrow it only to human voices frequencies, but this also reduces the overall sound quality of a normal voice conversation. NOTE: That’s why many times you have to use codes during a mobile conversation with a company or someone you do not know in person while providing personal details like (A from an apple, D from data ..etc), because some letters when you pronounce them they have high or low frequencies which have already been chopped off by the mobile network, for an example, if you pronounce the “S” letter over the phone, the other person might hear it like “F” letter. In a conclusion, mobile smartphones will definitely impact the sound quality negatively even though you use your headphones while using it, and it's not a good medium to play music for someone over a voice call conversation to show him how good music quality is that piece because he will hear the poorest quality version of it. Voice Over IP (VoIP) Sound Quality VoIP Stands for Voice Over Internet Protocol, in general, is the method used for voice communications on the internet. The VoIP technology offers way better quality than the old POTS telephony services back in the old days, and as a matter of fact about this new technology that was invented early in the seventies, that the first VoIP voice call test was accomplished in 1974, while the service was adopted around a decade ago for the public. NOTE: POTS stands for Plain Old Telephone Service, the old landline network service which many countries are still using. Some telecommunications companies are using VoIP technology in their international mobile or landline phone calls as a backbone service, and because the VoIP is an internet-based service, they intend (as far as I know) to compress the outgoing and incoming international voice calls to make them less in streaming size thus to reduce the pressure on their service bandwidth (to increase the number of calls at the same time) and also to reduce their costs. NOTE: International mobile or landline calls based on VoIP technology sounds very poor in sound quality because, for example, the mobile technology reduces the sound quality after cropping the high and low frequencies (as described in the previous subject above). And after this stage, they decode and compress the voice stream again to reduce its size for sending it over the VoIP internet-based service internationally to the other party. So imagine how many stages of reducing the sound quality will be processed to connect the international mobile phone calls based on telecommunication companies that are using VoIP for international phone calls. That's why they have good offers for you for international call prices because for them it costs nothing since it's internet-based. And also that's why making international mobile calls or landline calls sounds so crappy to older ages. NOTE: Using the old landline network for international calls have better sound quality but with bigger time delay because of using the old analog technology of sending voltage signals over cables and not using the speedy fiber medium as of nowadays. Ok, as an extra point, how could you tell whether you are currently using VoIP services and not being aware of that? I will tell you below in any case of them, means you are using it: If you are using an FTTH (Fiber To The Home) internet service from your ISP (Internet Service Provider) and that internet package integrated with landline telephony services. If your telephone service is from a cable provider like Spectrum, Cox ..etc, then most probably you are using it. Nowadays, most of the telephony services companies are using VoIP technology at their back-end. In a conclusion, VoIP adds value to the sound quality and provides a higher range of frequencies digitally unlike the old times when it was used in an analog manner with poor sound quality. Digital Vs Analog Audio Quality There are tons of technical information which I don't want to waste your time with when it comes to digital and analog audio, generally speaking, you cannot answer directly which one wins, but to look into this debate we should think of it from two different aspects so the image will be clear for you to decide. So let's give brief facts details about both analog and digital as below: Analog Audio Analog Audio Source Examples: Vinyl records turntable, Tape cassette, VHS cassette, Radio, Audio from local TV & Antenna... etc Headphones compatibility: Yes. Noise & Variations: Over time analog audio sources will have speed variation, frequency variation, Distortions ..etc Sound Quality Overtime: Changes. Loss Of Sound Quality: Changes, analog audio can lose their audible value when being played or copied. Time Negative Impact On Quality: When time passes analog will lose the sound quality for several reasons such as environmental, medium materials made of, usage, the lifetime of the medium ...etc. Digital Audio Digital Audio Source Examples: Audio CDs, Portable MP3 players, Computers & Tablets, smartphones, Digital Tv & Radio via Sattelite, DVD and VCD players ... etc Headphones compatibility: Yes. Noise & Variations: None, instead digital sources are steady, fixed frequency..etc Sound Quality Overtime: No change. Loss Of Sound Quality: No change, digital audio can be played and copied endlessly without ever losing their original quality. Time Negative Impact On Quality: No sound quality loss over time, but the environment might affect the lifetime of the medium at a very lower impact. Is it clear for you now to judge? nope, you better read further for more clarifications as this is not the end of the story for analog vs digital audio, at this point, you won't be able to decide which one is better for sound quality. All source of digital audio is basically analog! yes this is true when a guitar player records his music to a digital mixer he is basically converting the analog playing audio sound from analog (live guitar sound) to digital (mixer input), and this is similar to converting an old vinyl turntable music into digital but this one might have some distortion due to the usage of the vinyl record and how clean is it. Nevertheless, many audio music records are being converted back from digital to analog and the reason why because analog frequencies are much wider and variable compared to the digital fixed frequencies, having a variable frequency will give a more realistic and warm sound, unlike the digital might feel little crispy cold clean uninviting quality. But also we should not forget that Cassette tapes change its frequencies over time, hence they push the pitch up a little bit due to the chemical variation over time of the tape itself, that's why old cassettes will make the singer's voice thinner than what it was at the first time you listen to it several years ago. Vinyl records have a different issue, they add distortion over time because of its physical scratches but at the same time, they provide a wider range of frequencies and providing more warm sound quality that is closer to the real original sounds. NOTE: Cassette tape pitch up issue can be fixed easily by converting it to digital and by using an audio editing application or tool could do the job. So in conclusion, no one can claim or prove that vinyl has better sound quality than Cds for example, because its all about how you look at it from which perspective and flavor, hence I have told you, in general, the differences so you can be guided how to look in a new perspective towards both of them the analog and the digital sound qualities. Analog Radio Stations Audio Broadcast Quality Like FM and AM broadcasting that we listen to almost every day during our drive trips, or at our private offices, FM stands for Frequency Modulation and AM stands for Amplitude Modulation, technical wise, using different technical methods to be broadcasted and delivered to the listeners, but at the end, they both have a similar or close sound quality. The difference between FM and AM is that FM broadcasting covers a small amount of area ranged between 30 to 40 miles (50 to 65 Km) and get blocked by distractions during the way like hills, mountains, undergrounds.. etc, while AM broadcasting covers a very wider area due to its method of technology it is based on, it's lower frequency can travel as ground waves or reflect off the ionosphere. NOTE: That’s why AM radio sound quality became very sharp and clear at night because the ionosphere became closer to the ground at night due to lack of sun heat, so the AF frequency waves will have a shorter distance to reflect between the ground and the ionosphere limits, thus pushing the wave signals furthermore distances and accordingly the sound will be clearer. For the sound quality of Radio Station broadcast, you can sense that yourself, while listening to music via radio station you can compare it to a CD audio quality you will find a huge difference because of the attenuation the signal is being through till it reaches your audio receiver. The audio frequency signal being affected by several factors like attenuation by electrical network signals everywhere, electrical motors, or any electrical device, other radio stations might use close frequencies or the same in some cases, high power tension posts on the way... etc. The sound quality of a radio station broadcast will not have only the attenuation issues along the way, but also from the beginning the radio station broadcasting a limited sound quality with a certain range of frequencies, and being an analog frequency signaling, this will add a point to the cons list, because the analog signal wave will have to be encoded and compressed before it travels outside the radio station, then it will be decoded again and decompressed to reveal the sound at your receiver and this will impact the sound quality again negatively with loss. NOTE: There were several attempts in technology to enhance the sound quality by adding an analog noise reduction to radio broadcasting a long time ago but none have to succeed with a good result solution. In a conclusion, still, in our era with all the digital technologies, we haven't yet reached a time that we can replace normal radio station with digital ones, at the time we already have this technology via the internet live radio broadcasting and satellite radio broadcasting which is a digital solution that offers very good quality in sound with no analog issues and limitations. Conclusion Who doesn't like to listen to high-quality music sounds? either from a radio station or a CD or even an old vinyl records? we are all having this thought and always looking for the best sound quality when we are buying new headphones, or mp3 player ..etc, despite all of that, we still have many options to enjoy our favorite music regardless of some small (unnoticeable sometimes) differences in quality between devices or technologies or even the type of the audio file or its format. Share this article from below if you believe people need to know about it … 🙂