Sound Level Information

We are providing sound level information to help you understand the expected level of sound from a Dehumidifier. Within a compressor type dehumidifier there is a compressor that is similar to that of your refrigerator plus a fan motor. The compressor operates only when dehumidification is required. With a number of dehumidifiers the circulation fan will continue to operate even when dehumidification has ceased, though some machines will shut down completely


Many customer often ask about using the dehumidifier in a bedroom. The use of a dehumidifier in a bedroom is not really a good idea as sound may disturb plus some additional warmth from the dehumidifier may not be welcomed. We sell both compressor type dehumidifiers and absorption dehumidifiers with latter often being the quietest  of dehumidifiers, particularly when set to low fan speed. While absorption dehumidifiers are generally used in dwellings where internal temperatures may fall they can of course be used in the home and may well be the better choice of dehumidifier if you are going to use it during the night. The Ruby Dry is the quietest of all dehumidifiers with a decibel level of 29dBA on low fan speed.


Will sound levels bother you if you use it in a bedroom? If you do then you may wish to use the dehumidifier during the day or evening to reduce humidity and then switch the unit off before you go to sleep. However, with many dehumidifiers, in particular the Desiccant or Absorption types they can be used during the night with refrigerated dehumidifiers better off being used away from bedrooms.


How Loud is Dangerous?

190 dBA

Heavy weapons, 10 m behind the weapon (maximum level)

180 dBA

Toy pistol fired close to ear (maximum level)

170 dBA

Slap on the ear, fire cracker explodes on shoulder, small arms
at a distance of 50 cm (maximum level)

160 dBA

Hammer stroke on brass tubing or steel plate at 1 m distance,
airbag deployment very close at a distance of 30 cm (maximum level)

150 dBA

Hammer stroke in a smithy at 5 m distance (maximum level)

130 dBA

Loud hand clapping at 1 m distance (maximum level)

120 dBA

Whistle at 1 m distance, test run of a jet at 15 m distance


Threshold of pain, above this fast-acting hearing damage in short action is possible

115 dBA

Take-off sound of planes at 10 m distance

110 dBA

Siren at 10 m distance, frequent sound level in discotheques and close
to loudspeakers at rock concerts, violin close to the ear of an orchestra
musicians (maximum level)

105 dBA

Chain saw at 1 m distance, banging car door at 1 m distance (maximum level),
racing car at 40 m distance, possible level with music head phones

100 dBA

Frequent level with music via head phones, jack hammer at 10 m distance

95 dBA

Loud crying, hand circular saw at 1 m distance

90 dBA

Angle grinder outside at 1 m distance


Over a duration of 40 hours a week hearing damage is possible

85 dBA

2-stroke chain-saw at 10 m distance, loud WC flush at 1 m distance

80 dBA

Very loud traffic noise of passing lorries at 7.5 m distance,
high traffic on an expressway at 25 m distance

75 dBA

Passing car at 7.5 m distance, un-silenced wood shredder at 10 m distance

70 dBA

Level close to a main road by day, quiet hair dryer at 1 m distance to ear

65 dBA

Bad risk of heart circulation disease at constant impact

60 dBA

Noisy lawn mower at 10 m distance

55 dBA

Low volume of radio or TV at 1 m distance, noisy vacuum cleaner at
10 m distance

50 dBA

Refrigerator at 1 m distance, bird twitter outside at 15 m distance

45 dBA

Noise of normal living; talking, or radio in the background

40 dBA

Distraction when learning or concentration possible

35 dBA

Very quiet room fan at low speed at 1 m distance

25 dBA

Sound of breathing at 1 m distance

0 dBA

Auditory threshold