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Noun: pistonphone
  1. An acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones.
    "Pistonphones are highly dependent on ambient pressure (always requiring a correction to ambient pressure conditions) and are generally only made to reproduce low frequencies (for practical reasons), typically 250 Hz."

Type of: acoustic device

Encyclopedia: Pistonphone

Nearest

pistol grip
pistol shrimp
pistole
pistoleer
pistol-whip
piston
Piston
piston chamber
piston ring
piston rod
pistonphone
Pisum
Pisum arvense
Pisum sativum
Pisum sativum arvense
Pisum sativum macrocarpon
pit
pit bull
pit bull terrier
pit house
pit of the stomach