Pitch Discrimination in Background Noises up to 95 dB SPL
Medical research progress rept. no. 23
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
A pool of eight experienced subjects was used in studies of pitch discrimination at 1 kHz in quite loud background noises up to 95 dB per octave . Differential thresholds DF were collected for both the pitch-memory and pitch-modulation auditory tasks, which differed significantly in absolute DF and in the effects of overall loudness and in signalnoise ratio SN. Control experiments showed that neither the SN at 50 detection, nor the DF, deteriorated over at least a 20-min listening period, and probably indefinitely, and that the development of a subjectively noisy quality to a continuous pure tone does not necessarily render impossible quite good DF.