## Applied Acoustics |

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### Contents

Sound pressure power and intensity | 10 |

Spherical waves | 21 |

Loudness | 35 |

Copyright | |

12 other sections not shown

### Common terms and phrases

2irft 2nft absorption coefficient acoustic energy acoustic pressure air gap amplitude analysis angle of incidence applied approximation attenuation blades boundary calculation cavity components compression consider constant cos2 curves damping dB(A decibel depends diffuse direction displacement distance duct effect elasticity electrical energy density engine equal loudness equivalent absorption floating floor flow fluid force formula friction gives Helmholtz resonator high frequencies increase intensity large number layer load low frequencies material mathematics measured membrane metres natural frequency noise notation octave band particle velocity partition path phase phons Pici plane wave practical quency radiation ratio reduced reflection resistance reverberation silencer solid sound energy sound level sound level meter sound power sound power level sound pressure level sound travels sound waves spherical waves surface theory tion transmission coefficient transmitted varies vibration volume wall wave front wavelength waves travelling