Ⅰ．騒音の基礎 - e-jemai.jp

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2 10 I 202log10ppL 0log20ppL )dB(Pa10250 pp0 p 6 11 I Pa1045 )2log(20102104log2055 Pa10250 p510log5 12 I Pa2 pdB10010log20101log201022log20555 555101011101 Pa dB973100 7 13 I Pa1 p )10log202log20(1log201021log2055 5510121log201021log20 dB948014)10log(20)5log(204 410log4 dB9452060 )105log(20) (2045 14 I 2012 P143 8 dB 15 I 0log10 IIL )dB(2120W/m10 I 26W/m10 IdB6010log10101log101010log1066126 L 16 I )(W/m22cPI 400 c )(W/m40022PI (Pa) 400IP (Pa) cvP P Pa )

3 (W/m2 pvI 9 17 I 18 I 10 19 I Hz dB Hz dB Hz dB Hz dB dB Hz dB dB dB Hz dB dB dB dB dB dB Hz/dB log log 20 I 11 2012 P142 I 21 22 I 3dB )2/1log(20 xx10101 yxyxloglog)log( yxyxloglog)/log( xnxnloglog 2112 23 I LA5 LA50 LA95 10log(n))

4 24 I 10/Aeq101log10 LinL nLL1log10 Aeq nL AeqL 13 25 I 2012 P298 Pa m/s2 26 I 14 27 I 5)32(32)(10101010:101010 baba3)25(25)(10101010:101010 baba63232)(1010)10(:10)10( xx 28 I )1002log()200log(loglog)log(2 ) (log-log)log(2 yxyx210log210logloglog2 xnxn01log 110log 15.

5 29 I 310log1000log3 310log310logloglog3 30 I 22 HAL m m . m L A H LdBA 170fN (dB)13log10 NR 16 31 13log10 NRI 2012 P252 32 I 24r 334r ( ) lcf4 2r r 2 dB3:)2/1log(20:2/1 17 33 I TL nPPPP 21222212nPPPP 22221nPPPP 1log10 TL10101TL 10101TL 34 I )log(10 SLLPW 11log20 rLLWp8log20 rLLWp1 Q2 QS m2 18 35 I )105log(20)1/50log(20)/log(2011221 dB dB/DD dB dB/DD r64log10)2/8log(10)/log(101221 rrLL 36 I ALLWP4log10 SA 121221log10log10 AALLA m2 S m2 19 37 44)

6 Log(18 mfTL dB mm dB dB 18log 2 log2 )log(200 mfTL44)log(18 mfTL TL dB m kg/m2 f Hz I LAeq LA5 dB dB dB kHz dB dB dB Hz 38 I 20 I 2012 P292 39 40 I / ( Hz ) Hz mf1f2f Hz Hz 21fffm 122ff 21 I 2012 P291 41 dB 42 I 10 2012 P162 dB 22 43 I dB dB dB dB ( dB dB))

7 N dB dB3 LdB5 LdB6 LdB7 L 10 dB 44 I 2012 P433 23 45 I dB dB dB dB dB dB )log(10nLL dB L n70575)3log(1075 693/)737065( dB dB dB dB dB dB I.

8 46 24 II 48 II 25 m v m/s f Hz / Hz Hz 49 II vf fv fv f Hz 50 II

9 3dB 2/126 ( ) ( ) 51 II 0200yva 0200)2()2(yfvfa f 2 2012 P210 dB 52 II 25m/s105 )10/105log(2055 0log20aaL 250m/s10 a7=5log27 53 II 2m/s2 1061006)10log(20)2log(201012log20102log2 0555 xx10110 xx10101 xnxnloglog dB ( ) ( ) 54 II 28 Hz.

10 6dB/oct 2dB/1/3oct II 55 56 II Hz dB Hz dB dB Hz dB Hz dB dB Hz dB dB dB Hz dB dB dB dB dB dB 29 II 2012 P212 57