Human hearing principle and domestic headset tuning considerations
To research audio products, you first need to understand the principle of listening to the human ear and know what features our ears have.
As shown in the figure, the above is the basic structure of the human ear. The external auditory canal is equivalent to a sound conduit that conducts sound waves to the tympanic membrane. The external auditory canal of the human ear has resonance characteristics and varies depending on the length of the individual ear canal, but most of them are in the 3KHz frequency band. Therefore, sound waves in this frequency band will form resonance with the external auditory canal. This forms the first listening characteristic of our ears and is very sensitive to the 3KHz band.
In addition, because the pinna can play a sound effect. The structure of the auricle itself causes the auricle to have a good sound pickup for the front and side, and the rear sound pickup effect is poor. Both the auricle itself is very sensitive to the high-frequency sound, so that we can clearly distinguish the source of the azimuth of the sound when listening. This is what we call "positioning of sound."
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