Headphones: What You Need Know to Choose a Good Model

Buying headphones can be a challenge for anyone who wants to listen to music with quality sound, but does not understand much of the technical specifications of the device. Often, the acquisition is done blindly, with the indication of friends, confidence in the brand or simply because it is a beautiful model and with a good quality at first sight. To help those who identified with the situation, TechTudo clarifies the main specifications needed to choose a phone and find out which ones actually meet their needs.


The sensitivity measures, in practical terms, the volume that the headset can reach.The number found on the packaging means that for every milliwatt of power, it delivers a certain amount of decibels.This factor is measured in dB SPL (decibels of sound pressure level) and it is good to keep in mind that from 85 decibels, the sound is already high enough to cause damage to the hearing.


It is not necessary to plug the headphones into the outlet to make them work, but they work through electricity.And then the impedance enters, acting exactly like resistors.This measure is not only responsible for protecting the internal systems of the device, but also for preventing the sound of the vibrational frequency of electric power from interfering with the sound of the music being heard.As a general rule, the higher the impedance, the better the sound quality.

Maximum Power/Nominal Power Handling Capacity

Anyone who loves to listen to the songs as loudly as possible may already have gone through the unpleasant situation of the phone starting to break even with the strings intact.This is because, often, the maximum volume capacity of the device requires much more power than its maximum power – which causes the speakers to fail over time.Like the impedance, the higher the maximum power, the better.


The diaphragm of a headset is basically the speaker.There are many types, each with its specific characteristics, but the purpose of all of them in the end is to have the ability to perfectly reproduce any type of sound.There is no diaphragm model that is better than the other in all the features, but different people will like different types.

The dynamic diaphragm is most commonly found.It is the cheapest of the existing types and has a good sound amplitude – it can reproduce several types of frequency.This is the classic cone-like speaker, usually found on earbud headphones.Called “Moving Coil” in English, due to the movement of the speaker to produce the sound, they have as characteristic to maintain a sound more linear than the other types.

Electrostatics are the type of diaphragm in expensive earphones, and it is not without reason – they are highly technological, consisting of a thin film between two electrodes.They are delicate and require more energy than other types to function, which also results in more expense to companies, who need to ensure that this extra energy does not harm the user.

In terms of sound, electrostatic diaphragms are known for their ability to achieve various types of bass and treble, have a clean sound and the almost absolute absence of any signal of sound distortion.One bad point is that precisely because they are thin and light, they can not reproduce the bass very strongly.

There are even headphones with balanced armor diaphragms that, in most cases, make up the in-ear headphones – those with the silicone tips, which are actually placed inside the ear and help to cancel all the sound around.The reason for this is precisely the size of the diaphragm, which is the smallest of them all.Because they can not reproduce very high pitched or very bass sounds – and some models even have three or more of them inside each handset – they are slowly losing market share and are becoming more used in hearing impaired devices.

In short, the main items that should be observed when buying a headset are: the type and amount of diaphragms (also called drivers), impedance and sensitivity.The other features are important, but these three are most responsible for the device having the desired performance and the longest possible lifetime.

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