#hertz

• Audible — Capable of being heard; whose sound vibrations fall within the frequency and intensity limits specific to the sensitivity of the normal human ear (generally between 20 and 20,000 Hertz). Broadly and stylistically, the term describes a sound, voice, or acoustic signal possessing sufficient clarity to be perceived and understood by a receiver.
• Audio frequency — The frequency of an acoustic wave or an alternating electrical signal falling within the spectrum perceptible by the normal human ear, located between the approximate limits of 20 Hz and 20,000 Hz; audio frequency. In electronics, it defines the oscillation band processed by amplifiers and speakers.
• Audiogram — A graphic representation of an individual's hearing capacity, obtained through an audiometric test, which indicates the minimum threshold of sound perception across various frequencies for each ear. The chart correlates sound intensity in decibels with wave frequency in Hertz, serving as the core clinical tool to diagnose hearing loss.
• Audiometry — A clinical method of measuring hearing acuity and sensitivity using a device called an audiometer, by determining the perception threshold of sounds at various frequencies and intensities. The procedure enables professionals to diagnose the type, degree, and anatomical location of hearing loss.
• Audiometer — An electroacoustic high-precision device used in medicine and audiology to measure hearing acuity and determine the threshold of sound perception. The apparatus generates reference sound signals with strictly controlled frequencies and intensities transmitted via specialized headphones, allowing the practitioner to map out hearing loss.