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

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)

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

Which of the following statements are true for acoustic design of schools?

The main reference for acoustic design of schools is Building Bulletin 93
External wall sound insulation is important for schools so that occupants of neighbouring buildings are not disturbed by noise of children
Reverberation and transmission of speech characteristics are important for schools
Sound insulation in schools is not mentioned in Building Regulations

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

Which of the following statements are true for acoustic design of hospitals?

Sound insulation between rooms is not an important design consideration
Hospitals must be constructed using Robust Details
Hospitals must undergo on-site acoustic tests
The main reference for acoustic design of hospitals is HTM 08-01

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

1
2
3
4

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

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

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