The decibel (abbreviated dB) is the unit used to measure the intensity of sound. On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound ten times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB and a sound 1000 times more powerful than near total silence is 30 dB. As you can see, sound on the decibel scale increases by orders of magnitude, so 2 decibels is not twice as much as 1 decibel but 10 x as much.
You know from your own experience that distance affects the intensity of sound so the further away from the scource, the power is greatly diminished. But if you're very close to the scource of the sound you experience the full intensity. Anything over 85 dB for a prolonged period of time can cause hearing loss.
Here are some common sounds and their typical decibel ratings:
A typical rangehood would tend to be in the 50 to 65 decibel range. Not loud enough to cause hearing damage but certainly loud enough to be intrusive.
At 60 dB a rangehood is 1,000,000 more noisy than near total silence. That's a million times more powerful.
You don't see it and you probably never even think about it, rangehood ducting is taken for granted. But next time you switch on your rangehood and hate the noise it makes or lack of performance, consider having the ducting checked out.
Ducting is often the hidden problem with rangehood installations. A perfectly good rangehood is ruined by bad ducting that reduces airflow and increases noise.
Rangehood Tamer ducting kits introduce a new standard for ducting. This unique system incorporates a silencer on top of the rangehood (the noisiest part), much the same as you have on your car. Rangehood Tamer reduces the sound generated by the rangehood fan as it pushes air into the ducting line.. Visit the website for more information.