Re:9 Fans?
by
Reverberant
·
· Score: 5, Informative
35dba? That's not that impressive.
The 35 dBA spec is basically useless since it's given without a reference distance. With that in mind, 35 dBA is roughly the sound of a soft whisper at 5 feet (Ref: Martin Hirshorn, Noise Control Handbook). That's pretty darn quiet, assuming it refers to a reasonable distance from the chassis, say 3 to 5 feet.
My Panaflos are rated at 22dba, and I certainly wouldn't call them "silent".
Than they're probably louder than 22 dbA. 22 dBA is roughly the sound level at a remote area, at night, with no insect sounds or wind. If you live in a very quiet area, the sound level in your room may approach 25 dBA if your walls are well insulated, and no windows are open. No consumer sound level meter (Radio Shack brand, etc) would be able to accurately measure that low, and many professional level SLM's would have difficultly measuring that low (for example my $1800 TerraSonde ATB Pro has a noise floor of about 25 dB with its stock microphone).
Of course this all completely ignores the fact that measuring the sound level of a sound source that is lower than 40 dBA is pretty hard to do outside of an anechoic chamber since ambient sound levels can contaminate the measurements...
The 35 dBA spec is basically useless since it's given without a reference distance. With that in mind, 35 dBA is roughly the sound of a soft whisper at 5 feet (Ref: Martin Hirshorn, Noise Control Handbook). That's pretty darn quiet, assuming it refers to a reasonable distance from the chassis, say 3 to 5 feet.
My Panaflos are rated at 22dba, and I certainly wouldn't call them "silent".Than they're probably louder than 22 dbA. 22 dBA is roughly the sound level at a remote area, at night, with no insect sounds or wind. If you live in a very quiet area, the sound level in your room may approach 25 dBA if your walls are well insulated, and no windows are open. No consumer sound level meter (Radio Shack brand, etc) would be able to accurately measure that low, and many professional level SLM's would have difficultly measuring that low (for example my $1800 TerraSonde ATB Pro has a noise floor of about 25 dB with its stock microphone).
Of course this all completely ignores the fact that measuring the sound level of a sound source that is lower than 40 dBA is pretty hard to do outside of an anechoic chamber since ambient sound levels can contaminate the measurements...