Directive microphone arrays in hearing aids improve speech intelligibility in noise

Evidence

In the case of a hearing aid, it is generally assumed that the listener’s head is pointing in the direction of the sound of interest. In this way, a directional microphone selectively represents sounds to the front of the listener more than sounds to the side or the back of the listener. Assessment of directional microphones includes measurements of speech recognition thresholds (SRTs) in the laboratory, which has demonstrated great success in improving the perception of speech in noise. In some cases improvements in the SNR of over 7 dB have been observed (e. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1735 (#corroborates, via linked claim)

Categorization

• XREF: connects to: Directional hearing-aid microphones improve speech-in-noise SNR by over 7 dB. — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1735; Hearing aids must preserve adequate signal-to-noise ratio across varied scenarios; Directive loudspeaker elements act as spatial filters reducing array side lobes — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2907 (+5 more)

Broader Connections

• Directional hearing-aid microphones improve speech-in-noise SNR by over 7 dB. #corroborates (0.95) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1735
• Every 1 dB of signal-to-noise improvement raises speech intelligibility by 7 to 19 percent #expands (0.80)
• Hearing aids must preserve adequate signal-to-noise ratio across varied scenarios #expands (0.75)
• The better-ear advantage yields an 8 dB speech-recognition benefit in noise #corroborates (0.75)
• Practical audio devices rest on underlying acoustics principles #epitomizes (0.75)
• Directive loudspeaker elements act as spatial filters reducing array side lobes #expands (0.72) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 2907
• Fundamental frequency differences between voices improve speech intelligibility #expands (0.72) — Jennifer Lentz, Psychoacoustics- Perception of Normal…, 1313