The speech intelligibility benefit of a unilateral wireless system for hearing-impaired adults
Whitmer, William M.
Brennan-Jones, Christopher G.
Akeroyd, Michael A.
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Whitmer, W., Brennan-Jones, C. & Akeroyd, M. (2011) The speech intelligibility benefit of a unilateral wireless system for hearing-impaired adults, International Journal of Audiology, vol. 50, , pp. 905-911,
Objective: This study measured the effects of two previously untested practical considerations - venting and transmission delays - on speech intelligibility in a simulated unilateral wireless system, where a target signal in background noise was transmitted wirelessly to the hearing-impaired (HI) listener. Design: Speech reception thresholds (SRTs) relative to the signal-to-noise ratio (SNR) were measured by varying the surrounding babble noise level. The target signal was presented at 0 azimuth in the soundfi eld and unilaterally via an insert earphone, using open and closed fi ttings with simulated-wireless delays ranging between 0 - 160 ms. SRTs were also measured unaided and with participants ' current hearing aid(s). Study sample: Thirty-three mild-to-moderate sensorineural HI adults participated in the experiment. Results: For an open fi tting, the results showed a 5-dB SNR benefi t in SRT compared to unaided performance at shorter delays. For a closed fi tting, the majority of participants could accurately recognize speech below 20 dBSNR across delays. Conclusions: These results highlight the effi cacy of wireless systems with HI adults. Speech-intelligibility benefi ts are affected by transmission delays only when the delay is greater than 40 ms and the coupling is vented.Imagine: There's a boy called Billie who really wants to be a girl. But he's not allowed to show it. And there's a god called Jehovah who's got a wardrobe full of frocks. A closet he's afraid to show anyone. A closet he's locked and thrown away the key. Additional Information: It's begun to strike me, reading the book of GENESIS, that God's hiding something. He's not being straight with us. He's got something hidden in his closet, and tonight we're going to find out what it is... We'll find out through an experiment. An experiment with form. Traditional ideas of what manhood means are bringing war to every continent and endangering all of our lives. It's urgent that we explore different understandings of what it means to be a man; and to do so we need to explore different forms. So myself, the director Lorenzo Mele and the composer Robert Burlin, decided to collaborate to see how far we could get making words work with music, and music work with words. I t's an experiment in another sense too. I've written about 60 plays and seen them through into production. But I've never performed in one of my own. I'm curious to see what happens when I try