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A Device for Producing Two Serial Tone-Bursts of Different Loudness

A device is described which presents 2 serial tone-bursts to S. The duration of the tone bursts, the interval between tone bursts, and the intensity of the second relative to the first, may be changed at will by the operator. The device is capable of extension to allow other parameters, such as frequency or waveform, to be altered between tone bursts. The instrument is being used in a project to assess the effects of drugs on the latency of recovery from auditory stimulation.