headsets knowledge - understanding technical definition of headsets specifications

when you decide to buy a headsets, wireless headsets, or bluetooth headsets. you'll see the technical specification of the headsets. on this post, I'll tell to you a brief explanation about the technical specification of the headsets as explained below.

headsets knowledge - understanding technical definition of headsets specifications 


1.frequency response (Hertz)
The range of driver response to a given signal frequency. For example response frequency 20-30000 Hz, the lowest signal that can be converted transducer (in this case changes the analog electrical signal into sound waves) is 20Hz, and the highest 30000Hz.

But in fact, although drivers can responds at a frequency of 20Hz, if we give a 20 Hz signal, not necessarily to be heard. Because the level may be too small. For example Yuin PK3 (15-20000Hz), when I test with MP3 files 20Hz wave, only a very small sound at maximum volume (vol 50), and no sound at all on the normal volume of use. PK3 began to be heard clearly at a frequency of 35 Hz. This is also caused by PK3 earbuds have a character type with no insulation, so that less can be brought low freq waves to the eardrum. While the IEM, because of isolation can give a lower frequency.

2.impedance (unit ohms)
Impedance (or according to electrical engineering is also called barriers) is the resistance value measured at the pole "signal earphone jack. Under the formula V = I * R (V = voltage, I = current, R = resistance). So the greater the resistance / impedance , the greater the voltage needed, and the greater the volume on the DAP to achieve the volume of usage.

3.max power input (unit miliWatt)
Is the maximum power that can be borne by drivers. Exceeding this limit, then the driver will be damaged. (See max power output on your amp spec DAP and to adjust them).

4.sensitivity (decibels / miliWatt)
Is the increase in sound level per unit of power supplied. For example 100dB/mW, meaning that every increase in DAP 1mW or amp, the sound produced increased 100dB. Keep in mind the increase in decibels the sound level is not linear. So the greater the sensitivity, the louder the sound when we increase the volume on the DAP / amp.