Low frequency sounds (usually below 250Hz):
Deep male voice: The tone of a bass male voice usually belongs to the low frequency range.
Rumbling thunder: The low frequency component of thunder makes it sound deafening.
Heavy truck engine sound: The engine sound of a large vehicle contains a lot of low frequency components.
The roar of an earthquake: Earthquake waves contain a lot of low frequency energy.
Wind sound (slow speed): The sound of gentle wind, especially in a large space.
Mid-frequency sounds (usually between 250Hz and 4kHz):
Human voice (mostly): Most people's talking and singing voices are concentrated in the mid-frequency range.
The sound of most musical instruments: The sound of many instruments such as guitars, pianos, violins, etc. contains rich mid-frequency components.
Birdsong: The sound of many birds is in the mid-frequency range.
Water flow sound: The sound of flowing water such as streams and rivers.
Most environmental sounds: Most sounds in offices, streets, etc.
High-frequency sounds (usually above 4kHz):
Sharp whistles: The sound produced by a whistle has a high frequency.
Female screams: High-pitched screams.
Insect chirping: Many insects, such as crickets and cicadas, produce sounds with a high frequency.
High notes of some musical instruments: The high pitch of violins, flutes, etc.
The chirping of some birds: The chirping of some birds has a high-frequency component.
Frictional sounds: For example, the sound of nails scratching on a blackboard contains a large number of harmonics, a wide frequency range, and significant high-frequency components.
Retekess self-fitting hearing aids can test your hearing loss at different audio frequencies through scientific testing. You don't need to spend a lot of money, time, and energy to go to a specialized hospital for fitting. Compared with other headphones and over-the-counter hearing aids on the market, Retekess tws hearing aids will provide you with personalized hearing settings based on the test results. You don't need to adapt offline, nor do you need to adjust affordable hearing aids every month or quarter. Compared with other types of popular hearing aids, there is less howling.
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