This paper presents the estimation method for the sound pressure level and 1/3 octave band spectra of the low frequency sound radiated from bridges occurred owing to the bridge vibration excited by the passage of heavy vehicles. This estimation method involves as follows:
(1) Measureing the vibration acceleration level of the bridge.
(2) Calculating the radiation efficiency of the concrete slab.
(3) Calculating the distance attenuation of the low frequency sound.
Based on the estimated and measured results above mentioned, these indicate clearly that the proposed method can estimate the sound pressure level and 1/3 octave band spectra of the low frequency sound.
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