Intelligibility for both genders varied with aircraft noise spectrum and level. The intelligibility of female speech was lower than that of male speech for all experimental conditions however, differences were small and insignificant except at the highest levels of the cockpit noises. The experimental subjects used standard flight helmets and headsets, noise-canceling microphones, and military aircraft voice communications systems during the measurements. This applied study investigated the intelligibility of female and male speech produced in the noise spectra of four military aircraft cockpits at levels ranging from 95 dB to 115 dB. Current military aircraft voice communication systems were optimized for the male voice and may not adequately accommodate the female voice in these high level noises. The acoustic features of female speech are higher in frequency, lower in power, and appear more susceptible than male speech to masking by some of these military noises. Nixon, C W Morris, L J McCavitt, A R McKinley, R L Anderson, T R McDaniel, M P Yeager, D Gįemale produced speech, although more intelligible than male speech in some noise spectra, may be more vulnerable to degradation by high levels of some military aircraft cockpit noises. The intelligibility of female and male speech was equivalent for these conditions.įemale voice communications in high levels of aircraft cockpit noises-Part I: spectra, levels, and microphones. No significant differences were measured between the recognition accuracy of male and female speech by the automatic speech recognition systems. The intelligibility of vocoded female speech was generally the same as that of vocoded male speech. This Part II report examines the intelligibility in the same aircraft cockpit noises of vocoded female and male speech and the accuracy with which female and male speech in some of the cockpit noises were understood by automatic speech recognition systems. These results are discussed in a Part I technical report.
Although speech intelligibility of both genders was acceptable during normal cruise noises, improvements are required in most of the highest levels of noise created during maximum aircraft operating conditions. However, the differences were small and only those at some of the highest noise levels were significant. Aviat Space Environ Med 1998 69:675-83) female speech intelligibility measured in the spectra and levels of aircraft cockpit noises and with noise-canceling microphones was lower than that of the male speech in all conditions. In an applied research study, the intelligibility of female and male speech was measured in several high level aircraft cockpit noise conditions experienced in military aviation. Anecdotal information, supported by some empirical observations, suggests that some of the high intensity noise spectra of military aircraft cockpits may degrade the intelligibility of female speech more than that of male speech. However, due to small differences between their acoustic speech signals, called speech spectra, one can be more or less intelligible than the other in certain situations such as high levels of noise. The intelligibility of female and male speech is equivalent under most ordinary living conditions. Nixon, C Anderson, T Morris, L McCavitt, A McKinley, R Yeager, D McDaniel, M If your post has been removed, it's probably violated a subreddit rule.Female voice communications in high level aircraft cockpit noises-part II: vocoder and automatic speech recognition systems. You are responsible for reading the sidebar and subreddit rules. Use the Weekly Questions Thread pinned to the frontpage for general questions. Search the subreddit before posting your question has probably been asked and answered before! See /r/FindAUnit if you're looking for a community to join. Read the ARMA 3 Getting Started Guide in the Wiki.
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