The principal value of tone-burst signals as test signals for audio-frequency equipment is that they bear a closer resemblance to speech and music than do the more usual continuous tone or pulse signals. Yet the burst signal is periodic and simple enough to allow straightforward analysis. To test with a signal closely resembling actual use signals is desirable since it can decrease the cost of predicting in-use performance. If nonlinearities are involved, the prediction becomes more difficult, as for example measuring the clipping level of an amplifier, which is generally a function of time and level. Here tone bursts can turn a difficult measurement into an easy one.
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