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Characterizing Cabin Noise

From PCB Piezotronics, Inc.

Directives to assess and minimize cabin noise have become a top priority for the aerospace industry. From large
commercial jets, to helicopters, to small propeller aircraft the need is the same, which is for a reduction of cabin
noise. This is critical to the commercial success and competitiveness of the aerospace manufacturing industry
and desired for passenger comfort.
High amplitude acoustic signals, whether in the audible ranges of the human ear (20Hz to 20 kHz) or beyond
human hearing capability (infrasounds and ultrasounds) can range from being noisy and cause mild discomfort
to resonating human body components and inducing headaches or nausea. This is why there is an increasing
demand to reduce noise levels inside the aircraft to improve passenger comfort.

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Products & Services
Active Noise Control Products
Active noise and vibration control systems are products such as controllers, sensors and actuators that monitor and cancel noise and/or vibration.
Measurement Microphones
Measurement microphones are most commonly condenser microphones, which convert sound pressure to an output that is then converted into a reading such as sound pressure level (SPL).
Audio Amplifiers and Preamplifiers
Audio amplifiers and audio preamplifiers are used to increase the amplitude of sound signals.  Preamplifiers or preamps are designed to amplify low-level signal from a high-impedance device such as a microphone or instrument pick-up. After pre-amplification, the signal is sent to a power amplifier or amp, which provides the higher current necessary to drive the speakers.
Audio Microphones
Audio microphones are designed for sound reception and recording applications (speech and music).
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