The BURST signal (or Short Sweep on FP40 and the FP35) presents short bursts of sound at ten frequencies: 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, and 8000 Hz. (On the FP40 and FP35 200 and 700 Hz are used instead of 250 and 750 Hz.) This signal provides a quick way to determine the maximum output of the hearing aid with minimal discomfort to the patient. It can be used at lower amplitudes, as desired, but its big advantage is for testing maximum output. Since all the output of the aid is concentrated at one frequency at a time, testing with this signal gives you information on the worst-case performance of the hearing aid at each frequency, for any type of input signal. Noise reduction is automatically removed at 85 and 90 dB amplitudes since it is not necessary and makes the measurement take longer. Settling time is not used with BURST.