Inter-noise: Proceedings

A-weighted A-weighted sound absorption acoustic active noise control aircraft noise airport amplitude analysis annoyance attenuation average blade calculated co-gen plant components configuration curves dB(A December 4-6 decibels dipole distance duct effect engine environmental ENVIRONMENTAL NOISE evaluation excitation experimental flow Frequency Hz function impact increase input inter-noise 1989 December located loudness low frequency measured method microphone mode monitoring mufflers Newport Beach noise barriers noise exposure noise levels noise measurement noise reduction noise sources obtained octave band operating panel parameters performance pipe plate prediction propeller propfan radiated range residential resonance response rotor shown in Figure shows signal sone sound field SOUND INTENSITY sound level sound power sound power level sound pressure level sound source spectra spectrum speed standard structure technique tone transmission loss turboprop USA inter-noise 1989 values vehicle velocity vibration wave