7.29 cross correlation; interaural cross correlation. Covariance of signals vs. time shift; i.e., the degree of similarity of a reference signal and a time-shifted signal, as a function of time shift or delay. Annotation 1 The...
7.28 mechanical coupler. Device that presents a specified mechanical impedance to a vibrator applied with a specified static force and equipped with an electromechanical transducer to measure the alternating force level at the surface of contact between...
7.27 insertion gain. Difference between the earphone-presented sound pressure level and the open-ear sound pressure level, both measured at the eardrum. Unit, decibel (dB). Annotation Insertion gain may be...
7.26 simulated in situ. Hearing aid measurements made on a manikin which represents the head, torso, pinna, ear canal, and eardrum of a median human adult, instead of an actual human subject. Annotation ...
7.25 in situ. In the assessment of the performance of hearing aids, refers to measurements made on the hearing aid while it is in the position of normal use, i.e., on the ear of the wearer. Annotation Derived...
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