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Rationale for Speech Tests
I would appreciate your help on the following two questions.
Q1. Conventional speech perception tests are run using a fixed speech
(or noise) level and varying the speech-to-noise ratio (SNR); the
implicit assumption is that the speech reception threshold (SRT) is
independent of the absolute speech or noise levels. I would appreciate
some references that proof this statement and justify this procedure
(PDFs of the appropriate references would be even better).
Q2. Can speech psychometric functions (that is, functions representing
percent correct identification versus SNR) be modeled using signal
detection theory? I would also appreciate references.
Thank you so much in advance,
Enrique A. Lopez-Poveda, Ph.D.
Instituto de Neurociencias de Castilla y Leon
Universidad de Salamanca
Calle Pintor Fernando Gallego 1, 37007 Salamanca, Spain
Phone: (+34)923294500 ext. 1957; Fax: (+34) 923294750