報告書番号

285023

タイトル（和文）

低周波空気振動に対する感覚調査

タイトル（英文）

HEARING AND ANNOYANCE TO LOW FREQUENCY SOUNDS

概要 （図表や脚注は「報告書全文」に掲載しております）

１２．５ヘルツから６３ヘルツまでの周波数範囲の正弦波形の低周波空気振動を用いて，１８１名の被験者を対象に感覚調査を行ない，次のような結果を得た。低周波空気振動に対する感知渡および不快度は個人差が大きいが，年令や性別による差はほとんど認められなかった。人は低周波空気振動を主として聴覚で感知しており，全被験者の平均では，低周波空気振動を騒音レベルで評価した値が３０ｄＢ（Ａ）を超えると感知しはじめる。

概要 （英文）

EXAMINATION ON THE HEARING AND ANNOYANCE OF MAN TO THE LOW FREQUENCY SOUNDS WAS CARRIED OUT. SUBJECTS OF THIS EXAMINATION WERE ONE HUNDRED EIGHTY ONES IN ALL. AND TWENTY FOUR KINDS OF LOW FREQUENCY SOUNDS (12.5HZ-63HZ OF SINE WAVE, 70DB-90DB)WERE USED. RESULTS OF THIS EXAMINATION ARE SUMMARIZED AS FOLLOWS. THERE WERE REMARKABLE DIFFERENCES AMONG THE INDIVIDUALS AS FOR THE DEGREES OF HEARING AND ANNOYANCE TO THE LOW FREQUENCY SOUNDS, BUT THE DIFFERENCES BY THE DISTINCTION OF SEXES AND AGES WERE ALMOST NOTHING. ALMOST OF SUBJECTS FEEL LOW FREQUENCY SOUNDS BY AUDITORY SENSE, THEREFORE THRESHOLD OF HEARING TOTHEM ON AN AVERAGE IS ABOUT 30DB(A).

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