Exam Preview for 33538: A Deeper Look at Sound Environments August

A Deeper Look at Sound Environments

Please note: exam questions are subject to change.

1. To the hearing aid user, noise is Anything that he/she does not want to listen to at that moment in time Always competing speech Always Machine-based or traffic Must be above 70 dB SPL
2. According to the presenter, the more appropriate description than noisy environments is Speech babble situations Noisy competition Complex listening environments Negative SNR environments
3. The differences between realistic competition and engineering noise include Modulation behavior Linguistic content Varying levels Temporal All of the above
4. The typical relationship between changes in noise levels and speech production levels is A perfect match to maintain a constant S/N An increased in speech level, but not as much as the increase in noise level The talker maintains a constant level despite an increase in noise A speech level decrease as the talker gives up
5. According to the Sound Scene way of thinking: All noise is valuable and should be enhanced All noise should be eliminated There should be a certain "sound of a place" and that should not be dismissed too quickly Noise and speech have similar subjective value to the listener
6. According to Ramsdell, patients with hearing loss have difficulty because: They have trouble perceiving certain symbolic sounds (most importantly, speech) They have trouble detecting certain warning or signals They miss the connection to the environment at the primitive level All of the above
7. Machine approaches in hearing aids to noise control (including directionality) tend to Eliminate all noise Cannot actually remove any noise Can remove some but typically not all competition Can only operate on a long-term basis (measured in minutes)
8. The human cognitive system handles noise by Organizing sound environments Use a variety of cues to isolate and track speech and tracking streams of speech Suppressing sources of sound that are not desired All of the above
9. The second formant of speech (F2): Is redundant with the first formant Changes its relative level as speaking effort raises or lowers Occurs at a fixed frequency Only is reflected in consonants
10. Everyday speech levels Always occur at 63dB SPL Fill nearly the entire dynamic range of normally hearing listeners Always show the same long-term shape Are the same for men and women