The above-mentioned sound generator interior and the above-mentioned sound generating room inside the sound receiving room which

摘要

PROBLEM TO BE SOLVED: To obtain the mean sound pressure level by only one step of measurement in a frequency band required for measurements. ;SOLUTION: In a sound source room A, a noise involving a plurality of frequencies f1-f6 for use in the sound pressure level measurement is generated by a broad-band noise generator 1 of a sound source apparatus, a microphone 5 is moved in the sound source room A and sound receiving room B respectively along specified routes for 10-30 sec to collect sound pressure signals, band-limited sound pressure signals are extracted from the collected sound pressure signals at each of the plurality of frequencies, and the mean sound pressure level of the sound pressure signals at each of the frequencies and the mean sound pressure level in the sound receiving room B are calculated from the extracted sound pressure signals to calculate the difference in the sound pressure level between the rooms.;COPYRIGHT: (C)2000,JPO