There are dozens of Headphones at all prices. To find the good, it is still necessary to know what one wants to do.

Headphones or earphones?

If one seeks a discreet headset or city for sports, the in-ear headphones offer good audio quality to smartphone headsets. Equipped with plastic caps, they lodge in the ear canal.

The best sound quality, however, lies with headsets headband that land on the ear or the cover completely. In this category, headphones ‘closed’ leave no noise filter, unlike the models ‘open’, equipped with a small grid. We find them among the headphones designed for music lovers, because their sound is more air and more enjoyable.

Nomadic or sedentary?

Designed for music lovers who use it at home on a stereo, sedentary helmets are generally equipped with a wire with a 6.5 mm jack.

The nomadic helmet, he has a shorter wire and a 3.5mm jack for plugging in a smartphone. Some models are equipped with Bluetooth. The sound quality is slightly degraded, but great progress has been made in this area. Most display the Apt-X standard, most audiophile. Their autonomy has also elongated, up to thirty hours for some.

When listening to music in transportation, we can appreciate the “noise reduction”. A small processor inside the helmet analysis ambient noise and produces a opposite: the two cancel.

Finally, the difference between nomadic and sedentary goes into the same characteristics of the helmet and the quality of its product.

What sound quality?

The rendering of a mobile headset does not need to be as good as that of a sedentary helmet, especially because he reads mostly MP3 files whose quality is already very deteriorated.

Among the parameters to be studied, the impedance is the resistance to the passage of the electrical signal. More important it is, the better, but the headset will be powered by a powerful source … This is not the case of the MP3 player. An impedance of around 50 ohms is sufficient for portable headset. Professional models can reach 600 Ohms, but they are inaudible if the branch to a smartphone.

Bandwidth is the range of bass and treble the headset is capable of reproducing. Most offer frequencies that range from 20 Hz to 20 000 Hz, which covers the capabilities of the human ear. Beyond that, few people can hear new nuances.

Finally, the helmet sensitivity is its ability to offer high volume for a given power. It ranges from 90 dB to 130 dB. The bigger it is, the sound will be loud. But do not forget that MP3 players have limited output power by law corresponding to a sound pressure of 100 dB .