Hearing

Definition

Hearing is the perception of sound by detecting vibrations through an organ such as the ear. It involves the conversion of sound waves into electrical signals that are interpreted by the brain.

5 Must Know Facts For Your Next Test

1. The human ear can typically hear frequencies between 20 Hz and 20,000 Hz.
2. Hearing sensitivity varies across different frequencies, with the highest sensitivity around 2,000 to 5,000 Hz.
3. Sound intensity is measured in decibels (dB), and prolonged exposure to sounds above 85 dB can cause hearing damage.
4. The cochlea in the inner ear plays a critical role in converting mechanical vibrations into neural signals.
5. Resonance and standing waves within the ear canal enhance certain frequencies, aiding in sound localization.

Review Questions

• What frequency range is typically audible to humans?
• How does prolonged exposure to high-intensity sound affect hearing?
• What is the role of the cochlea in hearing?

Related terms

Frequency:

The number of oscillations or cycles per second of a sound wave, measured in Hertz (Hz).

Decibel:

A logarithmic unit used to measure sound intensity. One decibel (dB) represents a relative change in power or intensity.

Cochlea: A spiral-shaped cavity in the inner ear that transforms mechanical vibrations into nerve impulses.