How many Hz should I hear
Audible frequency range
Volume perception - the audible frequency range
Humans can only perceive airborne sound waves within a certain limit and a certain sound pressure. The minimum sound pressure that the ear can resolve is called the hearing threshold and depends on the frequency. The human ear does not perceive a change in volume in a linear manner. If the alternating pressure doubles, the volume does not automatically double. In order to perceive noise twice as loud, the sound energy must first be increased tenfold. An increase in volume by 10 dB results in a doubly perceived volume.
Influences on subjective hearing
Everyone feels frequencies differently loud. The frequency range between 1 and 3 kHz is the most sensitive area. The area in which one perceives different frequencies equally loud is called the phon. Generally speaking, you perceive high and low tones as more quietly than medium tones. The volume also has an impact on the hearing curve. The hearing curve evens out as the volume of the signal increases. The frequencies in the audible range are between 20 Hz and 20 kHz (20,000 Hz). This hearing spectrum is influenced by age, occupation and gender. With age, the audibility of the upper frequencies decreases to around 12 kHz. Tones that are higher than the audible frequency range are called ultrasound, lower infrasound. Young people often hear a few kHz in the ultrasound range.
Why do we hear worse with age?
Because the ear does not regenerate in contrast to other organs, a gradual hearing loss occurs with increasing age. Since the high frequencies are processed at the entrance to the cochlea, they are first lost.
The lower part of the cochlea, which is responsible for hearing high-pitched sounds, wears the most. In addition to the natural decline in perceptible frequencies, 50% of those over 60 years of age suffer from a loss of hearing at frequencies between 3 and 6 kHz. This means that older people perceive background noises in the upper frequency range very differently.
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