Abstract: Cabin audio systems for aircraft, aircraft cabin acoustics, aircraft cabin audio amplification, and audio amplification algorithms are provided. In particular, a speech amplification system including a first microphone configured to receive a first audio signal including an ambient noise and a second audio signal including a voice signal, a bandpass filter configured to filter the voice signal from the second audio signal, an amplifier configured to adjust an amplitude of the voice signal to generate an amplified voice signal in response to a control signal, a first speaker configured to receive the amplified voice signal and to provide the amplified voice signal a first seating location, a processor configured to generate the control signal in response to an amplitude of the first audio signal such that an amplitude of the amplified voice signal exceeds an amplitude of the ambient noise.