Is it better to have more or less thrust in the player? Is the resistance of the earphone good high resistance or low resistance?
A lot of people are confused about this sort of thing. Let’s talk about headphone impedance, thrust, Eq, and gain.
Sound transmission is essentially the transmission of sound waves. So it has the physical characteristics of wave reflection, refraction, and diffraction.
However, what is the nature of sound? It is necessary to know something about the characteristics of sound.
Loudness:
As a matter of fact, it’s what we call volume. The loudness of a sound is the subjective perception of the loudness of the sound by the ear. It is determined by the amplitude at the receiving end of the sound. The greater the amplitude, the greater the loudness. Decibels, on the other hand, are the lowest range of loudness that the human ear can distinguish. Loudness is a subjective feeling and different people have different sensitivity to loudness. Loudness is also related to decibels and frequency. The same decibel, different frequencies sound different loudness, so there is an equal loudness curve. Sounds of 50 decibels 100 Hz and 40 decibels 1000 Hz tend to sound equally loud to the human ear. So when the volume is adjusted, different frequencies are adjusted to different loudness to give different feelings. Let’s look at the picture of intensity in decibels and frequency.
A decibel is a parameter that objectively describes the sound. DECIBELS ARE USEFUL:
The sound of the jet taking off is about 130 decibels;
Propeller aircraft take-off sound about 110 DB;
A sound of 105 decibels can permanently damage hearing:
Pneumatic drill sound about 100 decibels;
Loud Bar About 90 decibels;
The sound at 85 decibels and below does not damage cochlear hair cells:
A noisy office is about 80 decibels;
75 DECIBELS IS THE UPPER LIMIT OF EAR COMFORT:
The street environmental sound is about 70 decibels;
The normal conversation sounds about 50 decibels;
About 20 decibels of whispering;
A noisy office is about 80 decibels;
