WorksheetsNoise & Sound
Total questions: 18
Worksheet time: 12mins
How is traffic noise measured?
Sound Level Meter
Frequency recorder
Sound analyzer
S-F Meter
In which unit sound is measured?
Kilogram
Pascal
Decibel
Kilometer
What is an Important factor to affect the noise level readings?
Indoor measurement only
Distance between source and source of sound
The direction the noise source is facing
Outdoor measurement only.
What are Ambient air quality standards in respect of noise for commercial areas?
65 dBA
75 dBA
70 dBA
80 dBA
What are the efficient ways to control aircraft noise?
Increase the amount of pressure it can withstand
Maximize the passengers to 100
Building aircrafts with old technologies
Constructing aerodromes far away from the residential areas
What is the dependence factor of degree of hearing loss?
variation in noise
Duration of noise
Intensity of noise
time
What is L90 noise?
the noise level below for 90% of the time of the measurement duration
The noise level exceeded for 10% of the time of the measurement duration
the noise level below for 10% of the time of the measurement duration
the noise level exceeded for 90% of the time of the measurement duration
Which one is not a fundamental step for noise pollution?
Source
Receiver
Detector
Path
Explain the suitable methods to reduce the Roadways noise?
no signal alteration of roadway surface texture
Use of noise barriers
Unlimited vehicle speed and movement
Avoid the tree plantation along the road
What are the day night equivalent values of sound level?
Lnd
L10
L50
Ldn
What is the type of sound absorbing material?
Permeable material
Perforated
Porous material
Low cavity resonators
What is good sound absorbent from the following?
Vermin proof
Fire resistant
Durable
Low coefficient
Which one is not a noise reduction method?
Avoiding noise pollution sources
Lubrication and better maintenance of machines
The use of creativity in house and office layout
Soundproofing
When can a person complain to the police regarding noise pollution level?
When the ambient noise standards exceed 10 dB
When the ambient noise standards exceed 30 dB
When the ambient noise standards exceeds by 50 dB
When the ambient noise standards exceed 20 dB
Which one is not the correct point for percentile levels that are used greatly when measuring environmental noise?
L90
L20
L10
L50
What is the objective of public education on noise pollution?
To provide available noise information and education materials
To avoid information for the maintenance of effective national and international program
To provide information for noise pollution activities.
To avoid understanding and acceptance of the need for noise program
Which one is an incorrect point for noise management programe?
Identify issues
Assessment and non corrective action
Periodic review
Planning noise mitigation and control measures
What is psychoacoustic?
the scientific study of sound perception and audiology
scientific study of sound pressure and micro physics
scientific study of sound perception and physics
scientific study of sound perception and background
