Beats Electronics urBeats User Manual page 17

(dB)
音声
/
* http://www.nidcd.nih.gov/health/education/teachers/pages/common_sounds.aspx
ノイズ レベル 影
(dB)
30
50-60
70
85-90 85 dB
(8
100 90 100 dB
110 100 dB
110-140
60 dB
)
15
1
125 dB
15