Exam Preview for 40494: Improved Speech Intelligibility in Noise wi

Improved Speech Intelligibility in Noise with Ultra-Low Delay

Please note: exam questions are subject to change.

1. Which of the following best describes the comb-filter effect? The general hearing output response measured from a hearing aid receiver. The resonance of the ear canal with a hearing aid inserted and turned off. The out-of-phase combination of direct sound and delayed processed sound in the ear canal. The measured response of a feedback signal after phase cancellation.
2. Which of the following is most likely to occur with higher processing delay than with lower processing delay in an open fit? The comb-filter effect. Feedback. Exact match to amplification targets. Gain increase
3. Which of the following is shown to provide lower (better) signal-to-noise ratios for 80% accuracy with an adaptive speech-in-noise test? Volume controls. Directional microphones. Venting. The comb-filter effect.
4. Which of the following statements related to processing delays is NOT accurate? Processing delays above 1 ms are audible to listeners with mild and moderate hearing losses. Those with mild and moderate hearing loss prefer the sound quality of ultra-low delay. The literature has indicated that delays less than 10 ms can be deemed acceptable. Lower processing delays are highly correlated with the comb-filter effect in closed fittings.
5. Which of the following statements most accurately describes the outcome of the study? Wearers demonstrated improved speech understanding in noise without decreased satisfaction in sound quality with the new directional microphone design. Adding directional microphones to a low delay program was ineffective in noise. Adding directional microphones to a low delay program resulted in decreased sound quality. Wearers demonstrated improved speech understanding in noise with decreased satisfaction in sound quality with the new directional microphone design.