What is the sound of one hand punching? It depends what movie you're watching. For the gritty "Out of the Furnace," released in December, the film's sound-effects designers wanted Casey Affleck's ...

This wind sound effect generator circuit perfectly imitate the noise of the wind. Transistor T1 is connected as a Zener diode and will provide a noise signal to T2. The amplified signal by T2 is led ...