CPD PROGRAMME Module 38 March 2012
1. If a sound of frequency 330 Hz is travelling through air at 0C, what will its wavelength be?
A 0.01m B 0.05m C 0.10m D 0.50m E 1.00m
2. When sound pressure level is determined from sound pressure, what is the value of the reference sound pressure?
A 1 pW B 90 dB C 20 µPa D 10-9 E 1 Pa
W
3. Using the phon scale, what approximate sound pressure level at 100 Hz is likely to sound the same loudness as 80 dB at 1,000 Hz?
A 10 dB B 80 dB C 90 dB D 100 dB E 1,000 dB
4. At what frequency range is the ear likely to be most sensitive?
A Less than 10 Hz B 10 Hz – 100 Hzl C 100 Hz – 1 kHz D 1 kHz – 10 kHz E Above 10 kHz
5. Which one of these is likely to be most influenced by lower frequency components?
A B
dBA dBC
C NR D NC E Phon
68 CIBSE Journal March 2012
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