2. It is given that the sound intensity level (in dB) of a sound is defined as B=10 log() where I is the sound intensity (in W/m²) measured and I₁=10-¹² W/m². (a) The sound intensity level of a vacuum cleaner is 75 dB. If the sound intensity of the noise from 1 an air-conditioner is of the noise from the vacuum cleaner, find the sound intensity 1000 level of the air-conditioner. (b) The sound intensity levels in the study room and at home are 45 dB and 55dB respectively. Find the ratio of the sound intensity in the study room to that at home.
2. It is given that the sound intensity level (in dB) of a sound is defined as B=10 log() where I is the sound intensity (in W/m²) measured and I₁=10-¹² W/m². (a) The sound intensity level of a vacuum cleaner is 75 dB. If the sound intensity of the noise from 1 an air-conditioner is of the noise from the vacuum cleaner, find the sound intensity 1000 level of the air-conditioner. (b) The sound intensity levels in the study room and at home are 45 dB and 55dB respectively. Find the ratio of the sound intensity in the study room to that at home.
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Transcribed Image Text:2.
It is given that the sound intensity level (in dB) of a sound is defined as B=10 log()
where I is the sound intensity (in W/m²) measured and I=10¯ W/m²
12
(a)
The sound intensity level of a vacuum cleaner is 75 dB. If the sound intensity of the noise from
1
an air-conditioner is
of the noise from the vacuum cleaner, find the sound intensity
1000
level of the air-conditioner.
(b)
The sound intensity levels in the study room and at home are 45 dB and 55dB respectively.
Find the ratio of the sound intensity in the study room to that at home.
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