Abstract
The nearfield noise from jet engines may contain impulsive sound signals with high crest factors. Most jet engine noise measurements are performed outside in potentially windy conditions, and it may, therefore, be necessary to use windscreens on microphones to reduce the influence of wind induced noise on the microphone. The windscreen will, however, influence the frequency response of the microphone especially at high frequencies. This will change both the magnitude and the phase response and, therefore, change the measured impulse. The effect of different sizes of windscreen is investigated and the effect on impulsive type signals is evaluated both in the time domain and the frequency domain.
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