1. But Grundig had to provide quite separate sound heads, and individual capstans to drive the tape.

2. Sound head, strong tone tail phenomenon are analyzed. (4) White noise of uniform distribution is implemented with the mixed congruential method.

3. A compound sound head is connected to an apparatus with diagnosis and positioning thrombolytic.

4. Sound Gate: The gate used in an optical sound head, instead of a sound drum, to keep the film sound track precisely aligned on the scanning beam slit during sound reproduction.

5. In this paper, we have studied and analysed the structure of the standard equipment of the sound head. working priciple. the application in examining and determining to the gas flowmeter as well.