An audio-tone-burst stimulator has been designed that employs a Hall-effect multiplier. This instrument produces modulation of the audio tone(s) by the desired envelope signal. An envelope-waveform generator is used that can deliver to the modulator a choice of either a Gaussian pulse, a triangle, trapezoid, or trapezoidal pulse with Gaussian leading and trailing edges. The duration of each of these waveforms is adjustable from a fraction of a millisecond to about 50 msec. The envelope signal is amplified before entry to the multiplier by a dc power amplifier. The modulator can handle any audio signal (including noise), with spectrum extending as high as 40 kcps. The audio rejection between pulses is 60 dB. The unamplified output-power level is adequate to drive a pair of Beyer DT 48 earphones.