Page 128 - 201901

124 2019 年 1 月

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TL/dB 0 TL/dB

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ᮠဋ/kHz ᮠဋ/kHz
(a) r  =0.2 m (b) r  =0.5 m
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ᮠဋ/kHz ᮠဋ/kHz
(c) r  =1.0 m (d) r  =2.0 m

图 3 不同声腔尺寸壳体的隔声量曲线
Fig. 3 The sound insulation curve of the shells with different acoustic cavities
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TL/dB 0 TL/dB 0

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0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70
ᮠဋ/kHz ᮠဋ/kHz
(a) ӭ᠏ᨂಏܧ (b) ӭ᠏ᨸಏܧ
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ᮠဋ/kHz ᮠဋ/kHz
(c) ӭ᠏ద఻ဝၕಏܧ (d) ӭ᠏ᆶൃᑛಏܧ
图 4 不同材料壳体的隔声量曲线
Fig. 4 The sound insulation curve of different material shells