Pure Tone definition
Medical Definition of PURE TONE. : a musical tone of a single frequency produced by simple harmonic vibrations and without overtones. a musical tone of a single frequency produced by simple harmonic vibrations and without overtones. Pure tone audiometry (PTA) is the key hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss. Thus, providing the basis for diagnosis and management.TA provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified. As PTA uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap. Definitions: 1. average in decibels of the thresholds for pure tones at 500, 1000, and 2000 Hz. In general, the pure-tone average should approximate the speech reception threshold. The definition information for pure-tone average is provided by Stedman's.You can search our medical dictionary here.n general, the pure-tone average should approximate the speech reception threshold. The definition information for pure-tone average is provided by Stedman's. You can search our medical dictionary here. A pure tone is a tone with a sinusoidal waveform. A sine wave is characterized by its frequency, the number of cycles per second—or its wavelength, the distance the waveform travels through its medium within a period—and the amplitude, the size of each cycle. pure tone is a tone with a sinusoidal waveform. A sine wave is characterized by its frequency, the number of cycles per second—or its wavelength, the distance the waveform travels through its medium within a period—and the amplitude, the size of each cycle. A pure tone is a tone with a sinusoidal waveform, i.e. a sine or cosine wave. pure sine wave is an artificial sound. Hermann von Helmholtz is credited as the first creator of a sine wave, using the 'Helmholtz siren ', a mechanical device that sends compressed air through holes in a rotating plate. PTA is a subjective, behavioural measurement of hearing threshold, as it relies on patient response to pure tone stimuli. Therefore, PTA is used on adults and children old enough to cooperate with the test procedure.TA provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified. As PTA uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap. 1 Pure-tone average (PTA) is the average of hearing sensitivity at 500, 1000, and 2000. 2  This average should approximate the speech reception threshold (SRT), within 5 dB, and the speech detection threshold (SDT), within 6-8 dB. Examples of abnormalities include occlusion of the external auditory canal by cerumen or a mass, middle ear infection and/or fluid, perforation of the tympanic membrane, or ossicular abnormalities. 2  Pure-tone air-conduction thresholds are poorer than bone-conduction thresholds by more than 10 dB (see image below). A pure tone has the unique property that its waveshape and sound are changed only in amplitude and phase by linear acoustic systems. A pure sine wave is an artificial sound.Hermann von Helmholtz is credited as the first creator of a sine wave, using the 'Helmholtz siren ', a mechanical device that sends compressed air through holes in a rotating plate. pure sine wave is an artificial sound. Hermann von Helmholtz is credited as the first creator of a sine wave, using the 'Helmholtz siren ', a mechanical device that sends compressed air through holes in a rotating plate. About this Document. These guidelines were developed by the Working Group on Manual Pure-Tone Threshold Audiometry, under the office of the Vice President for Professional Practices in Audiology of the American Speech-Language-Hearing Association (ASHA) and were approved by the ASHA Legislative Council in November 2005.bout this Document. These guidelines were developed by the Working Group on Manual Pure-Tone Threshold Audiometry, under the office of the Vice President for Professional Practices in Audiology of the American Speech-Language-Hearing Association (ASHA) and were approved by the ASHA Legislative Council in November 2005. However, there are benefits of using PTA over other forms of hearing test, such as click auditory brainstem response. PTA provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified.As PTA uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap.TA provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified. As PTA uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap.
A musical tone of a single frequency produced by simple harmonic vibrations and without overtones.