7.24 input-output characteristic. For a hearing aid, a single frequency plot of coupler SPL on the ordinate as a function of input SPL on the abscissa with equal decibel scale divisions on each...
7.23 Gaussian noise. Noise for which the amplitudes of some measure such as instantaneous voltage in an electrical signal or instantaneous sound pressure in an acoustical signal may be described by a normal (Gaussian)...
7.22 gain. Amount of amplification provided between the input signal and the output signal of a system. The parameter for which the gain is being specified, i.e., time-mean-square sound pressure, sound power, electrical voltage, or electrical power, should...
7.21 occluded ear simulator. Device which approximates the acoustic transfer impedance of the inner part of the human ear canal, from the tip of an ear mold to the...
7.20 supra-aural earphone. Earphone applied externally to the outer ear and intended to rest on the...
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