When people are searching for a new pair of headphones, they usually spend a lot of time reading their characteristics and specifications but the truth is they pay more attention to physical characteristics, battery life, Bluetooth version, etc. The part where frequency response, sensitivity, and impedance are listed are often skipped and neglected but these are very important features that affect headphone performance and sound quality. If you don't know how your headphones work, you won't be able to use them and maintain properly, and this is often one of the reasons why people are complaining about their headphones performance. We have run into this problem so many times that we have decided to write this article and explain headphone impedance in detail. If you understand what imp
We are all familiar with audio compression in terms of reducing audio file size to the size that enables us to store a great number of files on a single device. In that context, compressing is often related to low audio quality as the sound quality has to be reduced in order to achieve the necessary file size. However, audio compression is a very complex process that is often misunderstood. Audio compression tools are very useful and working with them is very interesting. This is the main reason why we have decided to write this article and explain the basics of audio compression so that you can get a better understanding of the entire process and maybe even start working with the respective tools and adjust the sound quality and size of the audio file to your own taste/needs. What is Aud...
What is, besides a wallet, phone, and keys, a "must-have" object in your bag or pocket? The answer is, in fact, quite simple – headphones. Even though the original headphone use wasn't related to listening to music at all, they’ve been present in our lives for almost 140 years and they have significantly evolved since the day they first appeared. Regardless of their purpose and way of use, headphones have been an extremely important part of our lives and our love for them has been growing for decades. It seems that no human can go outside without a pair of headphones. No matter if they are full-size headphones or earbuds, they are a mandatory accessory of every modern person. When they were first produced, there was only one model of headphones, while today, there is something for every
Have you ever wondered what those numbers on the back side of some audio device packaging mean? We bet you have. Among the information about impedance, SPL, etc. there is one that is very important for us right now and we want to give you a thorough explanation of what it means and what it says about our devices. As you have probably guessed, we are talking about frequency response. It is expressed in Hertz (Hz) and it’s different for every audio device. It is given in a form of range (for example – 18Hz-22kHz). This range tells us the lowest and the highest frequency some audio device (speaker, headphones) can deliver. The frequencies within the range that a human ear can hear are called audible (or audio) frequencies and this range is known as our audio spectrum. The property t
Noise is an omnipresent occupational hazard. So many workers, especially industry and construction workers all over the US, are exposed to excessive noise levels. Long-term exposure to these noise levels can cause hearing loss but can also affect human health in other ways. That’s why it’s so important to limit the exposure to excessive noise or, if that’s not possible, to use a hearing protection device (HPD). The market is flooded with all kinds of hearing protection earmuffs and earplugs, but which one should you choose? The most important characteristic you should be looking for when choosing a hearing protection device is the device’s noise reduction rating (NRR). In layman’s terms, noise reduction rating describes the ability of a certain HPD to attenuate noise. However, there’s
Reading all those numbers from the speaker’s specifications list can be a real nightmare if you don’t know what to look for and what all the numbers mean. Even if you have some basic understanding of these specifications, you might get confused by different measurement methods and different units. One of the characteristics that can be really tricky is speaker sensitivity and there are numerous reasons for that – some manufacturers call it efficiency (sensitivity and efficiency are not the same things), some manufacturers use dB at 1m per 1W, others use dB at 1m per 2.83V, different manufacturers use different measurement methods, etc. The main problem with sensitivity is that there is no industry standard when it comes to measuring and unit of measurement that would be the same for all th
Before we start talking about stereo amplifiers, let’s say a few words about amplifiers in general because we are sure many people don’t completely understand the working principle of an amplifier. What Are Amplifiers? The first amplifier was invented by an American engineer Lee de Forest in the early 1900’s. The invention was, in fact, the electron vacuum tube that was named ‘’Audion’’ and its purpose was to amplify weak current. That, however, wasn’t the final design of the amplifier as the followers of Mr. de Forest (Irving Langmuir and Edward Armstrong) managed to really understand how the amplifier worked and perfect it based on the new knowledge. They made the triode – vacuum tube with no air that contains three components (positive terminal – platinum plate, negative terminal – ca
If you’ve been buying modern electronic devices, especially earbuds and speakers, you have probably heard about the IPX4 rating. We assume that you have some basic understanding of IPX ratings but we’ve decided to write a short article about IPX4 water resistance rating and explain its meaning and importance. Many of today’s products are classified as water-resistant, water repellent, waterproof or hydrophobic. These terms are used to describe the level of protection against liquid intrusion and are often misunderstood because they are used in different situations and for different types of products. For example, the terms “water-resistant”, “water repellent” and “hydrophobic” are usually used to describe the level of clothes protection while the term “waterproof” is used to describe th
The year-end is near and it's the perfect time to look back and try to make some reflections. 2019 was an incredibly productive and exciting year for all of us at AudioReputation. We've tested so many amazing products - headphones, earbuds, speakers, home theater systems, DACs, amps, preamps, etc. Some of them were incredibly innovative, even revolutionary. Some have pushed the boundaries of exceptional sound quality and listening experience. We wanted to honor those best of the best and tell the world about their excellence. That’s what this article is about. We’ve had a difficult time trying to make a comprehensive selection and not to forget something. There were so many great products but we finally did it. We’ve selected the best products of the year 2019 and arranged them int
Surround sound systems have become popular only recently and this is what makes people think of them as of some new technology. Well, this is far from the truth as surround sound systems came into existence with the introduction of surround sound audio formats back in the 1930s. As you could probably guess, surround sound systems first appeared in the film industry and Disney was responsible for this innovation. At the time, the technology was too expensive for application because it required numerous speakers to create the effect of surround sound in a movie theater, so the creators gave up on it. This question was raised again in the 1950s (again, in the film industry) but its real expansion didn't start until 1975 when a new sound format Dolby Stereo appeared (you can find a more thorou...