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Sound quality aspects of small computer fans

Mike Magill (Institutionen för bygg- och miljöteknik, Teknisk akustik, Rumsakustik) ; Anders Genell (Institutionen för bygg- och miljöteknik, Teknisk akustik, Rumsakustik) ; Mendel Kleiner (Institutionen för bygg- och miljöteknik, Teknisk akustik, Rumsakustik) ; Daniel Västfjäll (Institutionen för bygg- och miljöteknik, Teknisk akustik, Rumsakustik) ; Willem Beltman
INTER-NOISE 2006 (2006)
[Konferensbidrag, refereegranskat]

The noise from personal computers is generally characterized by their fan noises. These may operate at a constant speed or have speed control based on component or ambient temperature. In domestic environments, any noise is of concern if it is attention-grabbing enough to cause annoyance. With this in mind, two listening experiments were conducted. The first test was conducted as an investigation into the threshold of audibility for hearing the tonal component of a fan in its normal running mode in the presence of background noise. The second test determined the limen of perception for a tone ramping in frequency and level as a fan increases its speed. Surprisingly, the results indicate that, in the tested octave, reduced ramp rates decreased the threshold of perception. The experiments further show the limen of perception of the tones to be the same for slowly ramped and stationary tones, and response times seem relatively shorter for lower ramp rates.

Nyckelord: Sound quality, tonality, annoyance, computer fan



Denna post skapades 2007-01-16.
CPL Pubid: 25639

 

Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Teknisk akustik, Rumsakustik

Ämnesområden

TEKNIK OCH TEKNOLOGIER

Chalmers infrastruktur