External sounds includes any type of exterior influences, including exterior parts and electrical/electromagnetic interference. Interference is outlined as any unwelcome indicators arriving as either voltage or current, at any of the amplifier’s terminals or induced in its affiliated circuitry. It might appear as spikes, ways, sine waves, or random sound. https://low-noise-amplifier91122.dailyhitblog.com/42672820/the-definitive-guide-to-low-noise-amplifier