Abstract
In Japan infrasound or low‐frequency noises are emitted from highway bridges, large compressors, boilers, and diesel engines etc. Windows or doors of wooden houses are vibrated by infrasound and emit rattling noises. Low‐frequency noises are sometimes heard directly and annoy people. These complaints and low‐frequency noises were investigated. Psychological and physiological influences on university students and low‐frequency noise sufferers were investigated in a laboratory. University students were not influenced as much by low‐frequency noise. The results clearly indicated that the heart and respiration rates of several low‐frequency noise sufferers increased. Many low‐frequency noise sufferers were influenced psychologically or physiologically.
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