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dB What is a Decibel?

The decibel (dB) is used to measure sound level, but it is also widely used in electronics, signals and communication.

On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB. Here are some common sounds and their decibel ratings:

  • Near total silence - 0 dB
  • A whisper - 15 dB
  • Normal conversation - 60 dB
  • A lawnmower - 90 dB
  • A car horn - 110 dB
  • A rock concert or a jet engine - 120 dB
  • A gunshot or fire work - 140 dB

Most of our Air Conditioners are between 45-60dB, a dishwasher is between 55-75 dB and a coffee perculator is 55dB.

All our Air Conditioners are not that loud and can be used throughout the day time with no disruption to everyday life, using them at night may be a little more disruptive especially if you are a light sleeper. 

Units at Air Con Direct compared to every day noises.

Sound Environment

Level (dB)

Air Con direct Products 
Threshold of hearing



Broadcast studio interior or rustling leaves  10 n/a
Quiet house interior or rural night-time 20 Insect Killers
Quiet rural area or small theatre 30 n/a 
Watch Ticking 40 Desk Fans / Air Coolers /Heaters
Dishwasher in another Room  50 Air Conditioner's  / Tower Fans
Ordinary Conversation 60 Air Conditioner's / Carpet Dryers
Vacuum Cleaner at 10ft 70

Commercial Air Conditioners

Passing Car at 10ft 80 Commercial Cooling Fans
Food Blender or a passing Bus 90 n/a
Lawn mower at 3ft



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