Acoustics quiz

Please answer the following 10 multiple choice questions, then click 'submit' to check the result. The pass mark for a CPD certificate is 8 out of 10, and you may retake the quiz as many times as you wish, but the questions will vary! Please note that one, two, three or all of the possible answers presented for each question may be right, and to gain a mark for that question all correct answers must be identified.

Good luck

Acoustics

For integration of elements which of these statements are correct?

It is necessary to consider the detailing for integration of elements to maintain acoustic performance
Only structural elements such as beams and columns are significant to sound insulation
Domestic scale pipes and electric cables are insignificant to sound insulation
Pipes and cables cannot be included in a domestic separating wall

The online acoustic performance prediction tool is ...?

Based on an empirical approach derived from acoustic test results
Intended for estimating purposes only
Intended to provide precise predictions
Only part of the solution, exact specification of materials and quality of workmanship are also important

For demonstrating compliance with the acoustic regulations which of these statements is correct?

Robust Details must be used for construction of new dwellings
Dwellings must either be constructed using Robust Details or on-site acoustic testing must be carried out
A qualified acoustic engineer must assess the details used for constructing dwellings
All dwellings must undergo on-site acoustic testing

To the human ear a 10 dB increase in sound 'feels' like an increase in loudness of how many times?

1
2
3
4

In England and Wales the impact sound requirement for a separating floor between purpose built dwellings is ...?

L'nT,w < 52 dB
L'nT,w > 62 dB
L'nT,w > 52 dB
L'nT,w < 62 dB

Which of the following design approaches should be applied for good acoustic performance?

Concentrate on reducing direct sound transmission rather than flanking sound transmission
Focus on reducing flanking sound as well as direct sound transmission
Apply the combined principles of mass, isolation and sealing
Concentrate on maximising mass to improve sound insulation

Application of the mass law shows that ...?

2 times the mass gives approximately 10 dB increase in sound insulation
3 times the mass gives approximately 5 dB increase in sound insulation
2 times the mass gives approximately 5 dB increase in sound insulation
3 times the mass gives approximately 12 dB increase in sound insulation

Loudness of sound is measured in what units?

Hertz (Hz)
Joules (J)
Decibels (dB)
Watts (W)

Which of these statements is correct?

It is generally easier to provide sound insulation for high frequency sound
It is generally easier to provide sound insulation for low frequency sound
Sound insulation materials have the same effect on high frequency and low frequency sound
Sound insulation is only required for low frequency sound

In England and Wales the airborne sound requirement for a separating wall between purpose built dwellings is ...?

DnT,w + Ctr ≥ 40 dB
DnT,w + Ctr ≤ 45 dB
DnT,w + Ctr ≥ 45 dB
DnT,w + Ctr ≤ 40 dB