• Activity 2
a) How many dB is the sound intensity of a whisper when
= 5,2.10 -12 W/m 2 ?
b) Calculate , if the intensity of the noise made by heavy traffic is 89,29 dB.
c) How many times greater than the intensity of a whisper is the intensity of heavy
traffic?
• Activity 3
Match the characteristic sounds with their dB.
Characteristic sound dB
The rustle of leaves 180
An aeroplane’s take off from a distance of 60m 120
Industry with heavy machinery 20
Tearing of paper from a distance of 1m 95
A rock concert at distance of 1m from the loudspeakers 45
Take-off of a spacecraft 120
By: Neofyta Tsagaridou , Marinos Georgiou
(Math teachers)
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