A MONAURAL COMPARISON OF TWO CIRCUMAURAL EARPHONES WITH A STANDARD AUDIOMETRIC EARPHONE
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
Pagination or Media Count:
A new procedure is described for determining the real-ear frequency response of an earphone when it is coupled to a human head. The air-conducted output of a standard and of a new earphone are successively adjusted to equal loudness with the constant reference loudness of a bone-conducted tone. Differences in voltages between the two earphones, at equal loudness, constitute a transfer function from the old to the new phone. The problem to the subject is a simple one of monaural loudness discrimination the transfer function is determined with about twice the precision and in no more than one-fourth the time of the usual alternate interaural loudness balancing with ear-reversal to allow for audiometric differences between the two ears.
- Electrical and Electronic Equipment
- Human Factors Engineering and Man Machine Systems