tone burst generator - counts the sine waves

A tone burst is a testfrequentlY used 10 audio engineering, partieulartyin loydsPea4er, measurements. It consists of -0 train of sine waves followed by an absence of "signal - The circuit suggested here can be " connected to any standard ssine: wave generator to produce tone bursts. This arrangernent makes it possible for - the circuit to be kept simple and compact. 11. ..••1 -1pfp,7- counts the sine waves The photograph shown in figure la was taken from an oscilloscope displaying tone bursts of eight sine waves followed by twenty-four periods of no signal, then eight sine waves again, and so on. It is important to note that the first sine wave starts, and that the eighth sine wave ends, at a zero crossing. Fourier analysis shows that the complete signal contains integral multiples and submultiples of the fun- damental sine wave. In tests, a tone burst may be considered as a combination of a continuous sine wave and a stepped signal. This makes it possible for two parameters o...