MEASUREMENT AND EVALUATION OF ENVIRONMENTAL VIBRATIONS

PART 2. INTERACTION OF SOUND AND VIBRATION

Abstract

Influence of sensation of noise on that of vibration was examined in order to search for perceptional interaction of sound and vibration. Under the condition that noise of diesel pile driver (P noise) was applied, perception of vibration of diesel pile driver (PV) was compared with that of the same PV or sinusoidal vibration to obtain equal sensation by a subject sitting on a vibration table. The level of compared PV judged as equal sensation was called equivalent level.
It was found that difference between equivalent level and applied level of PV was not so large and it was within 2 dB even at the noise level of 100 dBA. This difference might come partly from masking effect of noise and partly from difficulty of subjective judgement due to application of noise.