title: Improving speech intelligibility in background noise with an adaptive directional microphone.
abstract: Omnidirectional, supercardioid, and adaptive directional microphones (ADM) were evaluated in combination with the ADRO amplification scheme for eight participants with moderate sloping hearing losses. The ADM produced better speech perception scores than the other two microphones in all noise conditions. Participants performed the Hearing in Noise Test sentences at -4.5 dB SNR or better, which is similar to the level achievable with normal hearing. The Speech, Spatial and Qualities of Hearing Scale indicated no disadvantages of using the ADM relative to the omnidirectional microphone in real-life situations. The ADM was preferred over the omnidirectional microphone in 54% of situations, compared to 17% preferences for the omnidirectional microphone, and 29% no preference. The combination of the ADM to improve SNR, and ADRO to keep the signal output comfortable and audible provided near-normal hearing performance for people with moderate hearing loss. The ADM is the recommended microphone configuration for ADRO hearing aids.
authors.affiliation: Dynamic Hearing Pty Ltd, Richmond, Australia. pblamey@dynamichearing.com.au
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Blamey
authors.forename: Hayley J
authors.initials: HJ
authors.lastname: Fiket
authors.forename: Brenton R
authors.initials: BR
authors.lastname: Steele
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004867:Equipment Design; D005260:Female; D006310:Hearing Aids; D006319:Hearing Loss, Sensorineural / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise / Q000009:adverse effects; D017060:Patient Satisfaction; D013063:Speech Discrimination Tests; D013067:Speech Perception; D011795:Surveys and Questionnaires