Abstract:
Pure-tone testing is the primary audiological test procedure for the differential diagnosis of hearing loss and
hearing disorders in school-aged children. No research is currently available internationally for children’s responses
to continuous versus pulsed pure-tones. The aim of this exploratory investigation was to compare
the performance of a group of school-aged children on continuous versus pulsed pure-tone audiometry. The
aims were to determine whether a threshold difference existed between continuous versus pulsed puretones
and to record whether a listener preference existed between continuous versus pulsed tones for the
frequency range of 125 to 8000 H z. Eighteen children (36 ears) aged between 8-12 years, participated in a
hearing evaluation as well as in a brief three-question interview. Descriptive statistics viz. average threshold,
mean difference and standard deviation of thresholds were used to analyse data. Listeners’ perceived
preferences were calculated in percentages and reasons for preferring one signal over another was analysed
qualitatively. Although the automatically pulsed tone threshold (averaged across the frequencies tested) was
lower than for the continuous tone, the difference was only 0.2 dB in the left ear and 0.5 dB in the right ear.
This small difference is not important in clinical applications for which 5 dB increments are used in pure-tone
audiometry. Where a listener preference was indicated, however, the continuous tones were preferred over
pulsed tones by 56% percent of subjects. These findings differ from similar studies involving adults. This
revealed that children may yield different preferences during pure-tone testing than adults and that these
preferences should be taken into consideration during testing.
