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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 sound level meter (also called sound pressure level meter (SPL)) is used for acoustic measurements. It is commonly a hand-held instrument with a microphone . The best type of microphone for sound level meters is the condenser microphone, which combines precision with stability and reliability. [ 1 ]
N1-P2 cortical audio evoked potential (CAEP) audiometry; ABR is a neurologic tests of auditory brainstem function in response to auditory (click) stimuli. Electrocochleography a variant of ABR, tests the impulse transmission function of the cochlea in response to auditory (click) stimuli. It is most often used to detect endolymphatic hydrops in ...
A peak meter is a type of measuring instrument that visually indicates the instantaneous level of an audio signal that is passing through it (a sound level meter). In sound reproduction, the meter, whether peak or not, is usually meant to correspond to the perceived loudness of a particular signal. The term peak is used to denote the meter's ...
Many audio components are tested for performance using objective and quantifiable measurements, e.g., THD, dynamic range and frequency response. Some take the view that objective measurements are useful and often relate well to subjective performance, i.e., the sound quality as experienced by the listener. [13]
A peak programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories: True peak programme meter. This shows the peak level of the waveform no matter how brief its duration. Quasi peak programme meter (QPPM). This only shows the true level of the ...
Interactive maps, databases and real-time graphics from The Huffington Post
heterogeneity of parameters of sound-recording systems in smartphones and tablets, and also headphones or headsets; noise masking effect of tone signals [ 1 ] Advantages of the audiometry conducted with a specialized application or hearing aid application include availability and possibility to do the hearing test without assistance.
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