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1) According to ISO 389-7 (1996), at which of the following frequencies is
   normal hearing threshold highest for a pure tone?
a) 100 Hz;
b) 400 Hz;
c) 1 kHz;
d) 4 kHz.

2) The pure tone average (PTA) is the average of:
a) threshold in dB(SPL) at the audiometric frequencies;
b) threshold in dB(SPL) at the speech frequencies;
c) dB(HL) at the speech frequencies;
d) dB(HL) at the audiometric frequencies.

3) An increase in the peak amplitude of pure tone increases the sound's:
a) wavelength;
b) frequency;
c) power;
d) phase.

4) Postman and Egan (1949) found that exposure to a noise at 115dB(A) for 20
   minutes lead to:
a) temporary low-frequency hearing loss;
b) temporary high-frequency hearing loss;
c) permanent low-frequency hearing loss;
d) permanent high-frequency hearing loss.

5) According to Rosen et al. (1962), which of the following showed little sign
   of presbyacusis?
a) jute weavers;
b) Mabaan tribesmen;
c) concert violinists;
d) institutionalised mental patients.

6) The rifle shooters studied by Taylor and Williams (1966) had:
a) asymmetrical high-frequency hearing loss;
b) asymmetrical low-frequency hearing loss;
c) symmetrical low-frequency hearing loss;
d) symmetrical  high-frequency hearing loss.

7) Gardner (1973) found that vertical localisation was severely impaired when:
a) interaural time and intensity differences were reduced to zero;
b) sounds containing only the higher audible frequencies were presented;
c) the listener's head was held stationary;
d) the external ear's corrugations were filled.

8) The interaural time difference required to centre a sound with a particular
interaural intensity difference is:
a) constant;
b) larger at frequencies below 1.5 kHz;
c) a maximum at 1.5 kHz;
d) larger at frequencies above 1.5 kHz.

9) When Venturi (1796) asked listeners to locate the sound of a bell he found
    that they tended to confuse:
a) front with back;
b) left with right;
c) up with down;
d) near with far.

10) The number of fibres in the auditory nerve is:
a) 2;
b) 8;
c) about 25 thousand;
d) about 2 million.

11) The proposal that there is an auditory frequency analysis is:
a) Rayleigh's acoustical law;
b) Ohm's acoustical law;
c) Fourier's acoustical law;
d) Hertz' acoustical law.

12) An auditory frequency analysis is performed:
a) only when sounds have previously been memorised;
b) only when sounds have been perceptually grouped;
c) only when sounds have been interleaved;
d) on all sounds that the ear can detect.

Anthony J Watkins
The University of Reading
Department of Psychology