Headphone Attenuator Includes Microphone Monitor(耳机麦克风衰减器带监控)
Abstract:This application note presents a circuit that reduces input amplitude and amplifies a microphone input. Designed for use with earbuds, the circuit enables clear sound for conversation even when the earbuds are used with low-cost, less-sensitive headphones. The MAX4411 headphone amplifier and MAX9821 microphone amplifier are featured.