抄録
This report deals with an experimental method for estimating sound pressure level from the acoustical enclosures. By using the acoustic reciprocity technique, we measured the acoustic transfer function for sound radiation from the acoustic enclosures. Especially in case of the opening, we calculated the volume velocity by using the measured pressure level and theoretical radiation impedance. Eventually, sound pressure level from the opening are estimated by using the measured acoustic transfer functions and the calculated volume velocity. The application of this technique on the white noise sound source and the roots blower sound source is demonstrated. The comparisons were made between predicting results using the reciprocal technique and directly measuring results. Agreement is fairly good and it suggests that this method can be used to evaluate the sound pressure level from the opening of the acoustical enclosures.
