Music to the Ear?  

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Jenis: Article from Bulletin/Magazine
Dalam koleksi: The Economist (http://search.proquest.com/) vol. 406 no. 8826 (Mar. 2013), page SS5-SS6.
Topik: Ears & Hearing; Hearing Aids; Frequencies; Testing; Research & Development--R&D

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.75 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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People with hearing aids experience this problem constantly, says Brian Moore of the University of Cambridge. Typical hearing loss tends to be most acute at frequencies above 10kHz, which contain quieter sounds but where speech can still include important cues (as well as progressively less important ones extending up to 20kHz). Older hearing aids cut off at no higher than 6kHz, but much modern equipment stretches this range to 8-10kHz. However, a problem remains, Dr Moore says, because bespoke hearing-aid calibrations for individual users, called "fittings", do not properly boost the gain of these higher frequencies. So Dr Moore and his colleagues have come up with a better method. Their approach can be applied to many existing devices, and is also being built into some newer ones. Dr Moore's new test, known as CAM2, which is both a set of specifications and an implementation in software, extends and modifies fittings to include frequencies as high as 10kHz. When the results are used to calibrate a modern hearing aid, the result is greater intelligibility of speech compared with existing alternatives. CAM2 also improves the experience of listening to music, which makes greater use of higher frequencies than speech does.

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