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

Which of the following should be carried out for good detailing practice of junctions?

There should be continuous solid contact across separating walls and floors
Joints in lining boards should be staggered
Wall lining boards should be fitted in contact with the floor slab to minimise gaps
Avoid contact between wall and floor finishes

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

For separating floors between dwellings which of these statements are true?

Separating floors must include structural concrete
The ceiling part of the floor can have a significant effect on the acoustic performance
The floor treatment applied is usually insignificant to the acoustic performance
There is a wide range of separating floor solutions that can be used in steel framed buildings

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

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

For walls within the same dwelling (internal walls) which of these statements is true?

Internal walls must be at least 150 mm thick
Two layers of plasterboard must be used on both sides of an internal wall
For internal walls it is not necessary to demonstrate compliance with regulations by PCT or using Robust Details
Specially designed 'acoustic' studs must be used for internal wall construction

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

Sound insulation requirements are included in which part of the England and Wales Building Regulations?

E
B
A
L

Acoustic insulation testing is generally carried out at ...?

One single frequency
A range of frequencies from 100 Hz to 3150 Hz
Two specific frequencies of 100 Hz and 3150 Hz
A range of frequencies from 300 Hz to 1000 Hz