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Portable audiometer Maico, circa 1960s. An audiometer typically transmits recorded sounds such as pure tones or speech to the headphones of the test subject at varying frequencies and intensities, and records the subject's responses to produce an audiogram of threshold sensitivity, or speech understanding profile.
A hearing test provides an evaluation of the sensitivity of a person's sense of hearing and is most often performed by an audiologist using an audiometer. An audiometer is used to determine a person's hearing sensitivity at different frequencies. There are other hearing tests as well, e.g., Weber test and Rinne test.
The world's first hand-held and transistorized sound level meter, was released in 1960 and developed by the Danish company Brüel & Kjær. [5] In 1969, a group of University researchers from California founded Pulsar Instruments Inc. which became the first company to display sound exposure times on the scale of a sound level meter, as well as ...
The current International Organization for Standardization (ISO) standard for pure-tone audiometry is ISO:8253-1, which was first published in 1983. [7] The current American National Standards Institute (ANSI) standard for pure-tone audiometry is ANSI/ASA S3.21-2004, prepared by the Acoustical Society of America.
Audiogram. An audiogram is a graph that shows the audible threshold for standardized frequencies as measured by an audiometer.The Y axis represents intensity measured in decibels (dB) and the X axis represents frequency measured in hertz (Hz). [1]
Audiometry (from Latin audīre 'to hear' and metria 'to measure') is a branch of audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies. [1]
MA-1 may refer to: Bennett MA-1 ventilator, a powerful medical ventilator to assist respiration; Fire control system used on the F-106 interceptor; MA-1 bomber jacket, a nylon flight jacket; DI MA-1 rifle, a Myanma variant of the IMI Galil; U.S. Route 1 in Massachusetts; Massachusetts's 1st congressional district; HD Radio's AM hybrid mode
An audiometrist conducts hearing tests, or "audiometric screening", with an Audiometer to establish hearing levels. [3] The results are represented by an audiogram , and are usually interpreted by an audiologist , or a registered Medical Officer , [ 4 ] unless the audiometrist is also an audiologist, with the aim of diagnosing hearing loss .
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