Internal noises; noise within a system, are treated as disturbances and we make attempts to reduce it to a lowest level possible. There is another way to eradicate noise and on the other hand, take benefits from the noise itself. It sounds completely insane, don’t you think so? The circuit we are going to discuss here reveals the mystery. The circuit entitled, ‘Complex sound generators’ makes use of this waste like internal noise and tones to produce special effect sounds. The disturbance is thus replaced with an amazing feature. The chip contains various types of oscillators that are selected and controlled by the external pins. Pins, controlled with digital signals, will select different combinations of output signals from Voltage Controlled Oscillators (VCO), Super Low Frequency (SLF) oscillators, and Noise Generators so that they can be mixed together. The frequencies of the oscillators are set with resistor and capacitor combinations connected to other external pins. The resultant sound produced will simulate train whistles, guns, and other game sounds. The desired effect can be achieved with utilization of sound.
Basic key parameters of complex sound generator are briefed below:
- Supply current: – With Vcc equal to 9V, 19 mA is typical.
- Audio amplifier power: – These chips will include a small built-in audio amplifier designed to drive an eight ohm load. Power output typically is 125 mW to avoid circuit complexity.
Applications of complex sound generator
Used to produce audio sound for video games, alarms, toys, and control indicators.