Example: bachelor of science
www.toho-zinc.co.jp
(5cm) ( 35dB) 25dB) 'dB 20—20000Hz 10 -20 -40 -50 -60 (dB) -70 16 31.5 63 125 250 500 1k 2k 4k 8k 16k 120 110 100 go 80 70 60 50 40 ao 20 (200m)
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