Hearing level
Hearing Level
Hearing level (HL), pronounced as /ˈhɪərɪŋ ˈlɛvəl/, is a measure used in audiology to describe the volume level at which a sound is heard. The hearing level is measured in decibels (dB) and is used to assess an individual's ability to perceive sounds.
Etymology
The term "hearing level" is derived from the English words "hearing", which refers to the sense by which sound is perceived, and "level", which refers to the degree or extent of something. The term was first used in the field of audiology in the early 20th century.
Definition
Hearing level is defined as the lowest intensity of sound that an individual can hear. It is measured using an audiometer, a device that produces pure tones at specific frequencies and intensities. The hearing level is determined by finding the lowest intensity at which the individual can hear the sound at each frequency.
Related Terms
- Audiogram: A graph that shows an individual's hearing level at different frequencies.
- Audiometer: A device used to measure hearing level.
- Decibel: A unit of measurement used to express the intensity of sound.
- Frequency: The number of times a sound wave vibrates per second, measured in hertz (Hz).
- Pure tone: A sound with a single frequency, used in audiometry to test hearing level.
- Threshold of hearing: The lowest intensity of sound that can be heard by an average healthy human ear, usually defined as 0 dB HL.
See Also
External links
- Medical encyclopedia article on Hearing level
- Wikipedia's article - Hearing level
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