Sensibilitatea frecvenței căștilor

Răspuns la frecvență
Sensitivity has different values ​​at different frequencies, which is the frequency response. The dependence of sensitivity on frequency is expressed by a curve, which is called a frequency response curve. The human hearing range is 20Hz-20000Hz. Most people cannot hear sounds beyond this range. The frequency band that headphones can Reproduce este destul de largă, iar căștile excelente pot ajunge la 5Hz -45000 Hz . inegalitatea răspunsului la frecvență dat de căștile generale este plus sau minus 10dB, iar inegalitatea răspunsului de frecvență dat de căști profesionale, iar unele căști de înaltă calitate sunt plus sau minus 3DB .} Acest to have amazing frequency responses, while high-end headphones have mediocre frequency responses. A headphone with a truly flat frequency response curve will not sound good, because the sound has already interacted with the head to produce peaks and valleys before entering the ear canal. Therefore, when designing headphones, equalization is often used to make the frequency response curve received by the ear relatively Flat .
Egalizarea câmpului difuz
Există două moduri de egalizare a căștilor: egalizarea câmpului liber și egalizarea câmpului difuz . egalizarea câmpului liber presupune că mediul este nereflectiv, cum ar fi pustia; diffuse field equalization simulates a reflective room, and its sound is more natural than free field equalization. The International Electrotechnical Commission's method for testing diffuse field flatness can be found in standard IEC60268-7. However, diffuse field equalization is based on a standard head shape and room model, which will not satisfy all users and is not suitable for some recordings, such as dummy head recordings.