ᚑくᄢቇℂᎿቇ⎇ⓥႎ๔
J. Fac. Sci. Tech., Seikei Univ.
Vol.46 No.2 (2009) pp.117-123
㧔․೎⎇ⓥ⾌ߦଥࠆ⺰ᢥ㧕ᓸ⚦ᄙሹࠕ࡞ࡒ⭯᧼ߩ㖸㗀ㅪᚑᝄേ᜼േߣๆ㖸ࡄࡀ࡞߳ߩㆡ↪↰ਛ ବశ 㧘⨲⧛ ᮸ብ 㧘ጊᭂદ⍮㇢ 

Vibro-acoustic behavior of micro-perforated thin aluminum plate for sound absorbing panel
Toshimitsu TANAKA*1㧘Tatsuhiro KUSAKARI*2, Ichiro YAMAGIWA*3
ABSTRACT㧦New sound absorbing materials, micro-perforated aluminum thin plate and foil, have beendeveloped to solve some problems of fibrous sound absorption materials. But the stiffness of thin plate orfoil is not so high, so they are easily vibraeted by sound pressure. And sound absorption performance isaffected to decrease the value of the coefficient of sound absorption.

This paper presents the relation between the vibration mode and the performance of sound absorption of

perforated thin plate and the effectiveness of dampimg treatment for increasing sound absorption powerat the natural frequencies. And this paper describes the applications of these perforated materials as noise
abatement solutions.

Keywords㧦micro perforated plate, micro perforated foil, sound absorption , sound absorbing panel,

vibration mode 㧔Received October 4, 2009㧕㧝㧚ߪߓ߼ߦߘߎߢ㧘㖸࿶ߦࠃࠅബᝄߐࠇߚᓸ⚦ᄙሹ⭯᧼ߩᝄേ᜼േߣๆ㖸ᕈ⢻ߣߩ㑐ㅪᕈࠍ㧘ๆ㖸₸ߩ⸘᷹ߣ㕖ធ⸅࡟࡯ ❫⛽♽䈱ๆ㖸᧚ᢱ䈮䈲䋬᳓ಽ䉕฽䉖䈣႐ว䈱ๆ㖸ᕈ⢻ࠩᝄേ⸘ࠍ↪޿ߚᓸ⚦ᄙሹ᧚ߩᝄേ᜼േߩ⸘᷹ߣߦࠃࠅ㧘䈱ૐਅ䋬⠴ᾲ᷷ᐲ㧘⠴୥ᕈߥߤߩὐߢ໧㗴߇↢ߓࠆ႐วవߕታ㛎⊛ߦ᣿ࠄ߆ߦߔࠆߎߣࠍ⹜ߺߡ᧪ߚ(4)(5)‫ࠇߎޕ‬߇޽ࠆ‫߼ߚߩߘޕ‬㧘❫⛽♽ๆ㖸᧚ᢱߩᜬߟߘߩࠃ߁ߥ⺖߹ߢߦ㧘ห⭯᧼ߩᝄേߩ๟ᵄᢙ․ᕈߣ 2 ὐࡑࠗࠢࡠࡎࡦ㗴ࠍᡷༀߒ㧘߆ߟ࡝ࠨࠗࠢ࡞ᕈ߿シ㊂ᕈߩὐ߆ࠄⅣႺ⽶ᴺ(6)ߦࠃࠅ⸘᷹ߒߚๆ㖸₸ߣߩ㑐ㅪᕈߦߟ޿ߡታ㛎ߒ㧘⩄ߩૐᷫߦ߽ነਈߢ߈ࠆࠕ࡞ࡒߩ⭯᧼᧚߿ࠕ࡞ࡒ▗ߦᓸห⭯᧼ߩ౒ᝄ߇ๆ㖸ᕈ⢻ߩૐਅߩේ࿃ߣߥࠆߎߣ㧘߅ࠃ⚦ᄙሹടᎿࠍᣉߒߚๆ㖸᧚ᢱࠍ↪޿ߚๆ㖸ࡄࡀ࡞ߩ㐿⊒߮೙ᝄᕈߩઃടߦࠃࠅๆ㖸ᕈ⢻ߩૐਅࠍᛥᱛߢ߈ࠆߎߣ

߇ㅴ߼ࠄࠇߡ޿ࠆ

(1)(2)(3)ࠍ᣿ࠄ߆ߦߒ(4)㧘߹ߚห⭯᧼ߩో㕙ߦਗ਼ࠆᝄേಽᏓߩ⸘

‫ޕ‬ߒ߆ߒ㧘⭯᧼߿▗ߩࠃ߁ߦෘߺߩ⭯޿᧚ᢱߪ೰ᕈ߇ૐ᷹߿ታ㛎ࡕ࡯࠼⸃ᨆߦࠃࠅ㧘౒ᝄ๟ᵄᢙߦ߅ߌࠆๆ㖸ᕈߊߥࠅൎߜߢ㧘㖸࿶ߦࠃࠅബᝄߐࠇࠆᝄേߩᄢ߈ߐ߇ๆ

⢻ߩ⪭ߜㄟߺߩ⒟ᐲ߇౒ᝄࡕ࡯࠼ߦࠃࠅ⇣ߥࠆߎߣࠍ⷗㖸ᕈ⢻ߦᓇ㗀ࠍਈ߃ࠆ႐ว߇޽ࠆ‫߼ߚߩߘޕ‬ๆ㖸ࡄࡀ࡞಴ߒߡ᧪ߚ㧔5㧕‫ޕ‬ߩๆ㖸⸳⸘ࠍⴕ߁਄ߢ㧘ᓸ⚦ᄙሹ᧚ߩᝄേߣๆ㖸ᕈ⢻ߣᧄⓂߢߪ㧘㧝ᰴరᵄേવ៝ࠍታ⃻ߔࠆߚ߼ߦ↪޿ߚ㖸ߩ㑆ߩ㑐ㅪᕈࠍ᣿⏕ߦߒ㧘⸳⸘ߦ෻ᤋߢ߈ࠆߎߣ߇ᦸ߹㗀▤ౝߦᓸ⚦ᄙሹ᧚ߣⓨ᳇ጀߣߦࠃࠅๆ㖸᭴ㅧࠍ᭴ᚑߒ㧘ࠇߡ޿ࠆ߇㧘ႎ๔଀ߪ⷗ᒰߚࠄߥ޿‫ޕ‬ᐔ㕙ᵄℂ⺰ߦၮߕߊๆ㖸₸ߩ⸘▚ᑼߣታ᷹୯ߣߩᲧセ㧘ᓸ⚦ᄙሹ᧚ߩᝄേ⸘᷹ߥߤㅢߒߡߎࠇ߹ߢߦᓧࠄࠇߚਥ

*1: ℂᎿቇ⎇ⓥ⑼ࠛ࡟ࠢ࠻ࡠࡔࠞ࠾ࠢࠬࠦ࡯ࠬᢎ᝼: ℂᎿቇ⎇ⓥ⑼ࠛ࡟ࠢ࠻ࡠࡔࠞ࠾ࠢࠬࠦ࡯ࠬඳ჻೨ᦼ⺖⒟޿ߡㅀߴࠆ‫ޕ‬*2: (ᩣ)␹ᚭ⵾㍑ᚲ ᛛⴚ㐿⊒ᧄㇱ ᯏ᪾⎇ⓥᚲ  (tos-tanaka@st.seikei.ac.jp)  ቇ↢*3ⷐߥታ㛎⚿ᨐ㧘߅ࠃ߮ห᧚ߩๆ㖸ࡄࡀ࡞߳ߩㆡ↪଀ߦߟ㧙㧙

T  T up  ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅(3)  p1   = u1  㧞㧚ᓸ⚦ᄙሹࠍ฽߻㖸㗀▤ౝ㖸႐ߩℂ⺰


3

pa

 3㧚 ▤ౝߩવ㆐ࡑ࠻࡝࠶ࠢࠬ ࿑㧝ߦ␜ߔ㖸㗀▤ౝߦ⢛ᓟⓨ᳇ጀෘߺ l ࠍ੺ߒߡᓸ⚦ߎߎߢ㧘ᡷ߼ߡᄙሹ᧼߇㈩⟎ߐࠇߡ޿ࠆߣ߈ߩᓸ⚦ᄙሹ᧼ߩਔ㕙ߘࠇߙࠇߩႺ⇇㕙਄ߩ૏⟎ࠍห࿑ਛߦ␜ߔࠃ߁ߦԘ㧘ԙߣߒ㧘    [T ] = [Tp ][Ta ] =  11T T12  ⋅ ⋅ ⋅ ⋅ ⋅ (4) T21 T22 ૏⟎Ԛߪ㖸㗀▤ߩ⚳┵ߢ㐽㧘ઁ┵ߦߪో㕙߇ห⋧ߢ⺞๺ߣ߅߈㧘૏⟎Ԛߦ߅޿ߡ☸ሶㅦᐲ߇࠯ࡠߢ޽ࠆߎߣࠍ⠨ᝄേߔࠆࡇࠬ࠻ࡦ⁁㖸Ḯ߇⸳ߌࠄࠇߡ޿ࠆߣߔࠆ‫ޕ‬ᄙሹ᧼ߣ⢛ᓟⓨ᳇ጀߣߢ᭴ᚑߐࠇࠆๆ㖸᭴ㅧߦ߅ߌࠆๆ㖸₸ߩ୯ߪ㧘ห࿑ਛߩԘߦ߅ߌࠆ㖸࿶ߣ☸ሶㅦᐲߩᲧᘦߔࠆߣ㧘ᓸ⚦ᄙሹ᧼⴫㕙਄Ԙߩ㖸㗀ࠗࡦࡇ࡯࠳ࡦࠬኒᐲ z ߪ㧘㧔㖸㗀ࠗࡦࡇ࡯࠳ࡦࠬኒᐲ㧕߆ࠄᓟㅀߩࠃ߁ߦ᳞߼ࠄࠇࠆ(2)‫߅ߥޕ‬Ԙߦ߅ߌࠆ㖸㗀ࠗࡦࡇ࡯࠳ࡦࠬኒᐲߪ㧘Ԙߣ    z = p1 u1 = T11 T21 ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ (5) ԙߣࠍ⚿߮ઃߌࠆવ㆐ࡑ࠻࡝࠶ࠢࠬߣ㧘ԙߣԚࠍ⚿߮ߟߣߥࠅ㧘ု⋥౉኿ๆ㖸₸ α ߪᰴᑼ߆ࠄ᳞߼ࠆߎߣ߇ߢ߈

ߌࠆવ㆐ࡑ࠻࡝࠶ࠢࠬߣߩⓍ߆ࠄ▚಴ߔࠆߎߣ߇ߢ߈ࠆ‫ޕ‬ࠆ‫ޕ‬(1) ᓸ⚦ᄙሹ᧼ਔ㕙Ԙߣԙߣߩ㑆ߩવ㆐ࡑ࠻࡝࠶ࠢࠬ ᓸ⚦ᄙሹ᧼߇ᝄേߒߥ޿႐วߩᄙሹ᧼ਔ㕙ㄭறߩߘ     α =1−ࠇߙࠇߩ㖸࿶ߣ☸ሶㅦᐲߪ㧘ᰴߩવ㆐ࡑ࠻࡝࠶ࠢࠬߢ㑐ଥઃߌࠆߎߣ߇ߢ߈ࠆ㧔2㧕‫ޕ‬l㧟㧚ታ㛎ⵝ⟎ߣᣇᴺ  p1



u1p2p3u2u3

㧚 ᓸ⚦ᄙሹ᧼ߩᝄേಽᏓߣๆ㖸₸ߩ⸘᷹ ࿑ 2 ߦ᷹ቯࠪࠬ࠹ࡓࠍ␜ߔ‫ޕ‬㐳ߐ 1000mm㧘ౝᓘ 100mm㧘Ԙԙෘߺ 3mm ߩႮൻࡆ࠾࡞⵾ߩ౞╴ߩ৻┵ߦෘߐ 7mm ߩㅘԚ࿑㧝㧚㖸㗀▤ౝߩᄙሹ᧼ߣ⢛ᓟⓨ᳇ጀ l 

T up  ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅(1)    p1  = 1 Γ σ   p2  =     
 u1  0 1   u2  p2z − ρ 0 c0
⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅(6) z + ρ 0 c0᣿ߥࠟ࡜ࠬ᧼߇ⵝ⌕ߐࠇ㧘ߘߩࠟ࡜ࠬ᧼߆ࠄⓨ᳇ጀ30mm ࠍ੺ߒߡ౞╴ౝㇱߦᓸ⚦ᄙሹ⭯᧼߇๟✼࿕ቯߐࠇ

2

 2

ߎߎߢ㧘Γ = jωM A + RA 㧘 R = 2 RV (l A + l R ) 㧘l R ≅ 2a 㧘  Aaߡ޿ࠆ‫ࠍࠞ࡯ࡇࠬߦ┵ઁޕ‬㈩⟎ߒ㧘⊕⦡㔀㖸ࠍ⊒↢ߐߖl A :᧼ෘ㧘 σ :㐿ญ₸㧘 2a :ሹᓘ Rv :ო㕙ߦ߅ߌࠆ☼ᕈᛶߚ㕖ធ⸅ဳߩࠬࠠࡖ࠾ࡦࠣᑼ࡟࡯ࠩ࠼࠶ࡊ࡜ᝄേ᷹ቯⵝ

᛫ଥᢙ, ߥ߅㧘MA ߪ▤┵⵬ᱜߒߚሹㇱߩ㖸㗀ࠗ࠽࡯࠲ࡦࠬ  ߢ޽ࠅ㧘 R A ߪ㧘หߓߊ㖸㗀࡟ࠫࠬ࠲ࡦࠬߢ޽ࠆ‫ޕ‬ߚ‫ޕ‬ห⭯᧼ߩᝄേߩ᷹ቯߪ㧘ࠟ࡜ࠬ᧼┵ߩ╴ᄖߦ⸳⟎ߒ
⟎(Polytec GmbH ␠⵾ PSV-400-1D)ߦࠃࠅⴕߞߚ㧔౮⌀㧝㧕‫ޕ‬ᝄേߩ᷹ቯ૏⟎ߪଏ⹜૕ߩో㕙ߦਗ਼ࠆ 7 চ㑆㓒ߩᩰሶ⁁ߩ੤ὐ૏⟎㧔✚⸘ 175 ὐ㧕ߢ޽ࠆ‫ޕ‬ ⓨ᳇ጀㇱԙߣԚߩ㑆ߩવ㆐ࡑ࠻࡝࠶ࠢࠬ  ෘߺ l ߩⓨ᳇ጀߩਔ┵ԙߣԚߩ㖸࿶ߣ☸ሶㅦᐲࠍ㑐෶ๆ㖸₸ߩ⸘᷹ߪ㧘ੑὐ㑆ߩ㖸࿶ߩવ㆐㑐ᢙࠍ⸘᷹ߒ㧘
2 ࡑࠗࠢࡠࡎࡦᴺ㧔6㧕ߦࠃࠅ᳞߼ߚ‫ޕ‬ଥઃߌࠆવ㆐ࡑ࠻࡝࠶ࠢࠬߪ㧘 j ࠍ⯯ᢙන૏ߣߒߡ๟

⍮ߩᑼ(2)ߢਈ߃ࠄࠇࠆ‫ ߢߎߎޕ‬ρ 0 c0 ߪⓨ᳇ߩ࿕᦭㖸㗀㧚 ታ㛎ߦ↪޿ߚᓸ⚦ᄙሹ⭯᧼ᛶ᛫ߢ޽ࠆ‫ޕ‬ coskl
 p2    = j sin kl
u2   ρ c
 0 0jρ0c0 sin kl
 p3  = coklt u3   T up ⋅⋅⋅⋅⋅⋅⋅⋅⋅ (2) 2a  2k ᵄ㐳ቯᢙ㧘 t ⓨ᳇ጀෘߺ㧘 ρ 0 ⓨ᳇ߩኒᐲ㧘 c 0 㖸ㅦ㧚 ๆ㖸₸ߩ▚಴࿑㧝ߦ␜ߔ㖸㗀♽ߦ߅޿ߡ㧘૏⟎Ԙߣ૏⟎Ԛߩߘࠇߙࠇߩ㖸࿶ߣ☸ሶㅦᐲߩ㑆ߦߪ㧘ᑼ(㧝)ߣᑼ(㧞)ߣ߆ࠄᰴߩ

࿑㧞㧚ᓸ⚦ᄙሹ᧼ߩᝄേಽᏓߣๆ㖸₸ߩ⸘᷹ࠪࠬ࠹ࡓ㑐ଥᑼ߇ᚑ┙ߔࠆ‫ޕ‬㧙㧙㪪㫆㫌㫅㪻㩷㪸㪹㫊㫆㫉㫇㫋㫀㫆㫅㩷㪺㫆㪼㪽㪽㫀㪺㫀㪼㫅㫋㪈㪇㪅㪐㪇㪅㪏㪇㪅㪎㪇㪅㪍㪇㪅㪌㪇㪅㪋㪇㪅㪊㪇㪅㪉㪇㪅㪈 㪇calculated

measured౮⌀㧝㧚ᓸ⚦ᄙሹ᧼ߩᝄേ⸘᷹㪉㪇㪇㪋㪇㪇㪍㪇㪇㪝㫉㪼㫈㫌㪼㫅㪺㫐㪲㪟㫑㪴㪏㪇㪇㪈㪇㪇㪇࿑㧟㧚 ଏ⹜૕ C ߩု⋥౉኿ๆ㖸₸ߩ᷹ቯ୯ߣ⸘▚୯ ㅪᚑήߒ౮⌀㧞㧚ᓸ⚦ᄙሹ᧼ଏ⹜૕㧔೙ᝄᕈઃടήߒC 㧘᦭ࠅ D 㧘᦭ࠅ E 㧕⴫㧝㧚ᓸ⚦ᄙሹ⭯᧼ଏ⹜૕ߩ⻉రଏ⹜૕⸥ภ ᧼ෘC ሹᓘ 㐿ญ₸೙ᝄᕈઃട࡮஻⠨OO OO  ߥߒ࡮๟ㄝ࿕ቯ᧦ઙߦ㪪㫆㫌㫅㪻㩷㪸㪹㫊㫆㫉㫇㫋㫀㫆㫅㩷EQGHHKEKGPV⧯ᐓߩᏅ⇣D OO OO  ᏷  চ㧘ෘߺ  চߩ࿑㧠㧟ଏ⹜૕ߘࠇߙࠇߩๆ㖸₸๟ᵄᢙ․ᕈߩ᷹ቯ୯ ࠕ࡞ࡒ᧼ࠍෘߺ OO

ࠇࠆߎߣ߇ಽ߆ࠆ‫ޕ‬೙ᝄᕈߩઃടߦࠃࠅᓸ⚦ᄙሹ᧼ߩᝄߩਔ㕙࠹࡯ࡊߢ⾍ઃേ߇ᛥ೙ߐࠇࠆߎߣ㧘߅ࠃ߮᧼߇ᝄേߒߥ޿ߣ઒ቯߒߚE OO OO  ᏷ 㨙㨙㧘ෘߺ  চ⸘▚୯ߣታ᷹୯ߣߩ㑆ߦᏅ⇣߇↢ߓࠆ๟ᵄᢙၞ߇ሽ࿷ߔ㧔ធ⌕᧚ෘߺㄟߺ㧕ߩ
೙ᝄ᧚ࠍ⾍ઃ

ࠆߎߣߩએ਄ߩ 2 ὐ߆ࠄ㧘ᓸ⚦ᄙሹ⭯᧼ߩๆ㖸ᕈ⢻ߪ᧼ߩᝄേߩᓇ㗀ࠍฃߌߡ޿ࠆߎߣ߇ផቯߐࠇࠆ‫ޕ‬ᓸ⚦ᄙሹ⭯᧼ߪࠕ࡞ࡒว㊄⵾ߢ޽ࠅ㧘᧼ෘߣሹᓘ߅ࠃ߮㐿ሹ₸ߪ⴫ 1 ߦ␜ߔㅢࠅߢ޽ࠆ‫ߩࠄࠇߎޕ‬୯ࠍห৻ߦ଻㧚 ᓸ⚦ᄙሹଏ⹜૕ᝄേߩ᷹ቯ⚿ᨐߜ㧘ห⴫ߦ␜ߔ೙ᝄᕈࠍട߃ߚ႐วߣട߃ߥ޿႐วߣߦ 㖸㗀▤ౝㇱߩ㖸࿶ಽᏓߣ૏⋧ߩ᷹ቯ߅ߌࠆฦ⹜㛎૕ߘࠇߙࠇߩᝄേ᜼േߣๆ㖸₸ࠍ᷹ቯߒߚ‫ޕ‬ ᓸ⚦ᄙሹ᧼ㄭறߦ߅ߌࠆ㖸ᵄߩવ៝⁁ᴫࠍᛠីߔࠆฦଏ⹜૕ߩ✜రߣߘߩ౮⌀ࠍ⴫ 1 ߣ౮⌀ 2 ߦ␜ߔ‫ޕ‬ߚ߼ߦㄭற 10mm ૏⟎ߦ߅ߌࠆ㖸࿶ಽᏓߣ૏⋧ࠍ᷹ቯߒߚ⚿ᨐࠍ࿑ 5 ߦ␜ߔ‫⋥ޕ‬ᓘ✢਄ߩฦ૏⟎ߦ߅ߌࠆ㖸㧠㧚ታ㛎⚿ᨐ

࿶࡟ࡌ࡞ߣ૏⋧ߩ୯ߦᱴߤᏅ⇣ߪߥߊ㧘ห᭽ߥ௑ะߪᄙሹ᧼߆ࠄࠃࠅ㔌ࠇߚ૏⟎ߦ߅޿ߡ߽᷹ⷰߐࠇ㧘㖸Ḯ㧚 ᓸ⚦ᄙሹ⭯᧼ଏ⹜૕ߩๆ㖸₸ߩ᷹ቯ⚿ᨐ߆ࠄᄙሹ᧼ㄭற 10mm ߹ߢߩ▸࿐ߢߪ߶߷ᐔ㕙ᵄߢવ ࿑ 3 ߦ೙ᝄᕈࠍઃടߒߥ޿ଏ⹜૕(a)ߩု⋥౉኿ๆ㖸₸៝ߒߡ޿ࠆߎߣ߇⏕⹺ߐࠇߚ‫ޕ‬

ߩᑼ(6)ߦࠃࠆ⸘▚୯ߣታ᷹୯ߣࠍ␜ߔ‫▚⸘ޕ‬୯ߪᓸ⚦ᄙ ᓸ⚦ᄙሹ᧼ᝄേߩ๟ᵄᢙ․ᕈ

ሹ᧼߇ᝄേߒߥ޿ߣ઒ቯߒߡ┙ᑼߒߚ႐วߩ୯ߢ޽ࠆ‫ޕ‬ ࿑ 6 ߦ㧘ଏ⹜૕ో㕙ߦࠊߚࠅ᷹ቯߐࠇߚᝄേᄌ૏ᝄ

ห࿑߆ࠄ⚂ 700Hz એ਄ߩ๟ᵄᢙᏪၞߦ߅޿ߡߪ㧘ታ᷹୯ߣ⸘▚୯ߣ߇߶߷⦟ߊኻᔕߒߡ޿ࠆ߇㧘600Hz ઃㄭߢߪ᏷ߩᐔဋ୯ߩ๟ᵄᢙ․ᕈࠍ␜ߔ‫ޕ‬೙ᝄᕈߩ᦭ήߦ߆߆
ࠊࠄߕห࿑ਛߦ␜ߔ 200Hz ߆ࠄ 855Hz ߩ 5 ๟ᵄᢙߦ߅

⸘▚୯ࠃࠅ᷹ቯ୯߇ᄢ߈ߊૐਅߒߡ޿ࠆߎߣ߇⹺߼ࠄࠇ

޿ߡ 3 ଏ⹜૕ߦ౒ㅢߒߚ๟ᵄᢙߢࠬࡍࠢ࠻࡞ߩථ⿧ᕈ

ࠆ‫ᧄޕ‬ႎߢߪߎߩ⪭ߜㄟߺ⃻⽎ߦᵈ⋡ߔࠆ‫ޕ‬߇⹺߼ࠄࠇࠆ߇㧘ߎࠇࠄߩථ⿧ࠬߵࠢ࠻࡞ߪ㖸㗀▤ߩ ࿑ 4 ߦߪ೙ᝄᕈࠍઃടߒߥ޿ଏ⹜૕㧔a㧕ߣ೙ᝄᕈࠍઃ

౒㡆ߦࠃࠆ߽ߩߢ㧘࿑ 7 ߦ␜ߔ᭽ߦᓸ⚦ᄙሹ᧼ㄭறߩ

ടߒߚଏ⹜૕(b)ߣଏ⹜૕(c)ߩๆ㖸₸ߩ๟ᵄᢙ․ᕈߦߟ

㖸࿶ߢᱜⷙൻߔࠆߎߣߦࠃࠅᓧࠄࠇࠆථ⿧๟ᵄᢙߩ୯

޿ߡߩ᷹ቯ୯ߩᲧセࠍ␜ߔ‫ޕ‬560Hz ઃㄭߩๆ㖸₸ߩᄢ߈߇᧼ߩ౒ᝄᝄേᢙߣߥࠆ‫߅ߥޕ‬࿑ 7 ߆ࠄ㧘೙ᝄᕈࠍઃ

ߥ⪭ߜㄟߺ߇೙ᝄᕈࠍട߃ࠆߎߣߦࠃࠅᄢ߈ߊᡷༀߐ

ടߔࠆߎߣߦࠃࠅߎࠇࠄߩථ⿧ᕈ߇ᄢ᏷ߦ✭๺ߐࠇ㧘㧙㧙߆ࠄᝄേᄌ૏ߩථ⿧๟ᵄᢙઃㄭߦ߅޿ߡߪ㧘ๆ㖸₸ߩ୯₸ߩᡷༀߪߎߩථ⿧ᚑಽߩᝄേߩૐᷫߣኻᔕߒߡ޿ࠆ߇ዪᚲ⊛ߦૐਅߔࠆ߆ᄌᭂὐߣߥߞߡ޿ࠆ௑ะ߇⏕⹺ߐ

ߣℂ⸃ߐࠇࠆ‫ޕ‬ࠇࠆ‫ޕ‬හߜ㧘ᓸ⚦ᄙሹ᧼ߩ౒ᝄ๟ᵄᢙߢߪๆ㖸₸߇ૐਅ

Saund pressure Ievel(dB)ᝄേᝄ᏷ߢ߶߷ 1/10 એਅߦૐᷫߒ㧘560Hz ๟ㄝߩๆ㖸ߔࠆߣ⸃ߐࠇࠆ‫ߒ߆ߒޕ‬㧘ߘࠇࠄߩૐਅ㊂ߦߪᏅ⇣߇޽ࠅ㧘ᄙሹ᧼ߩᝄേࡕ࡯࠼ߣߩ㑐ㅪᕈࠍ᣿ࠄ߆ߦߔࠆߚ߼
ታ㛎ࡕ࡯࠼⸃ᨆࠍታᣉߒ㧘એਅߩ⚿ᨐࠍᓧߚ‫ޕ‬






Difference of phaseangle(degree)

Frequency(Hz)(a) ᄙሹ᧼ㄭற10চߩ⋥ᓘᣇะ5 ὐߩ㖸࿶࡟ࡌ࡞ߩ๟ᵄᢙ․ᕈ
90
60
300-30100-60-90ᄙሹ᧼ਛᔃ䈎䉌਄䈮㪌㪇㫄㫄ᄙሹ᧼ਛᔃ䈎䉌਄䈮㪉㪌㫄㫄ᄙሹ᧼ਛᔃᄙሹ᧼ਛᔃ䈎䉌ਅ䈮㪉㪌㫄㫄ᄙሹ᧼ਛᔃ䈎䉌ਅ䈮㪌㪇㫄㫄

200

300

400

500

600

700

800

(a) 260Hz (1.0)mode

900 1000

Frequency

(b) ᄙሹ᧼ㄭற10 চߩ⋥ᓘᣇะ5 ὐߩਛᔃὐၮḰߩ૏⋧Ꮕ࿑㧡㧚ᄙሹ᧼ㄭற চߦ߅ߌࠆ㖸࿶࡟ࡌ࡞ߣ૏⋧ (b) 315Hz (1.1)mode(c) 465Hz (1.2)mode

Normalized vibration displacement࿑㧢㧚ଏ⹜૕ో㕙ߩᝄേᄌ૏ᝄ᏷ᐔဋ୯ߩ๟ᵄᢙᔕ╵ (d) 560Hz (2.0)mode(e) 685Hz (1.3)mode࿑㧣㧚ㄭற㖸࿶ߢᱜⷙൻߒߚᝄേᄌ૏ᝄ᏷ᐔဋ୯ (f) 785Hz (2.1)mode࿑㧤㧚ଏ⹜૕ C ߩᝄേᄌ૏ᝄ᏷ߣๆ㖸₸ߩ๟ᵄᢙ․ᕈᲧセ(5)(g) 910Hz (1.4)mode࿑ 8 ߦ೙ᝄᕈࠍઃടߒߥ޿ଏ⹜૕ో㕙ߦࠊߚࠆᝄേᄌ

࿑㧥㧚౒ᝄ๟ᵄᢙߦ߅ߌࠆ࿕᦭ᝄേࡕ࡯࠼ PO 㧘 P▵౞ᢙ㧘O▵⋥ᓘᢙ㧘Ꮐ࿑㧦ታ㛎ࡕ࡯࠼⸃ᨆ㧘ฝ࿑㧦ᒝ೙ᔕ╵⸘᷹㧕 ૏ߩᐔဋ୯ߣๆ㖸₸ߣߩ๟ᵄᢙ․ᕈߩᲧセࠍ␜ߔ‫ࠇߎޕ‬㧙㧙 ᓸ⚦ᄙሹ᧼ߩᝄേࡕ࡯࠼ᮮゲߦ๟ᵄᢙࠍߣࠅ㧘ฦ૏⟎ߦ߅ߌࠆᝄേᝄ᏷ߩᄢ߈ߐ

 ࿑ 9 ߦታ㛎ࡕ࡯࠼⸃ᨆߩ⚿ᨐߣ࡟࡯ࠩ࠼࠶ࡊ࡜ᝄേ

ࠍ⦡⴫␜ߒߚ‫ޕ‬ଏ⹜૕(a)ߩ႐วߪ㧘(b)㧘(c)ߩ႐วߣᲧセ᷹ቯߦࠃࠅᓧࠄࠇߚหߓ౒ᝄ๟ᵄᢙߦ߅ߌࠆࡎࡢࠗ࠻

ߒߡࠬࠤ࡯࡞߇ 10 ୚ᄢ߈޿‫ޕ‬ଏ⹜૕(a)ߦ⷗ࠄࠇࠆಽഀ

ࡁࠗ࠭ടᝄᤨߩᝄേᆫᘒߣࠍ␜ߔ‫ޕ‬ห࿑ߩᏀ஥ߩ↹ߪᝄേߪ(b)㧘(c)ߩ႐วߦߪᶖᄬߒ㧘(c)ߩ႐วߦᝄേ߇৻⇟ታ㛎ࡕ࡯࠼⸃ᨆߦࠃࠅᓧࠄࠇߚ࿕᦭ᝄേࡕ࡯࠼ࠍ㧘߹ዊߐ޿㧔࿑ 7㧕ߎߣ߇ๆ㖸₸ߩᦨᄢ㧔࿑ 4㧕ߣኻᔕߒߡ޿ࠆߎߣ߆ࠄ߽㧘⭯᧼ߩᝄേ߇ๆ㖸₸ߦᓇ㗀ࠍਈ߃ߡ޿ࠆߎߣ߇⏕⹺ߢ߈ࠆ‫ޕ‬߅ߌࠆᝄേᆫᘒߢ޽ࠆ‫߅ߥޕ‬㧘ฦ࿑ߩฝ஥ߩ↹ߦߟ޿ߡߪ㧘⿒⦡♽ߣ✛⦡♽ߩ㆑޿ߪ૏⋧߇ㅒߢ޽ࠆߎߣࠍ㧘߹ߚ⦡ߩỚ᷆ߪᝄ᏷ߩᄢዊ㧔⭯޿⒟ᄢ㧕ࠍ␜ߒߡ޿ࠆ‫ޕ‬ ห࿑ਛߩ(a)㨪(g)ߩߘࠇߙࠇߩߤߩ౒ᝄ๟ᵄᢙߦ߅

޿ߡ߽㧘࡟࡯ࠩ࠼࠶ࡊ࡜ᝄേ᷹ቯⵝ⟎ߦࠃࠅ᷹ቯߐࠇߚᝄേࡕ࡯࠼ߣታ㛎ࡕ࡯࠼⸃ᨆߦࠃࠅᓧࠄࠇߚᝄേࡕ࡯࠼ߣߪ߶߷⦟ߊኻᔕߔࠆ⚿ᨐߣߥߞߡ߅ࠅ㧘⊕⦡㔀
Fig.12Phase difference between plate-vibration and sound pressure࿑ 㧚ਛᔃㄭறߩ㖸࿶ߣ᧼ᝄേߣߩ૏⋧Ꮕ㧔᷹ቯ୯㧕㖸ߦࠃࠆᐢᏪၞടᝄߦ߅޿ߡ߽౒ᝄ๟ᵄᢙߦ߅޿ߡߪ߶߷න⁛ߩ࿕᦭ᝄേࡕ࡯࠼ߢᝄേߒߡ޿ࠆߎߣࠍ⹺⼂಴᧪ࠆ‫߅ߥޕ‬㧘ห࿑ਛߩ㧔 l , m 㧕ߦ߅ߌࠆ l ߪ▵౞ߩᢙࠍ㧘 m ߪ▵✢ߩᢙࠍ␜ߔ‫ޕ‬

Phase difference [ q]ߚฦ࿑ߦ߅ߌࠆฝ஥ߩ↹ߪ࡟࡯ࠩ࠼࠶ࡊ࡜ᝄേ⸘᷹ߦ
ࠃߞߡᓧࠄࠇߚᐢᏪၞᒝ೙ᝄേᤨߩථ⿧๟ᵄᢙᚑಽߦ㧡㧚⠨ ኤ (a) specimen (a)ዪᚲ⊛ߥๆ㖸₸ߩૐਅ߇․ߦᄢߣߥࠆ 560Hz ߢߪ㧘(2,0)

ࡕ࡯࠼ߣ▵౞ߩߺߢ▵✢ߩή޿ࡕ࡯࠼ߢ޽ࠆߎߣ߇ᵈ⋡ߐࠇࠆ‫ ߩߎޕ‬560Hz ߩ๟ᵄᢙᏪၞߢߪ㧘࿑ 10 ߆ࠄᄙሹ᧼ᝄേߣਛᔃㇱㄭறߩ㖸࿶ߣߩ૏⋧㑐ଥ߇ㅒ⋧ߣߥߞߡ߅ࠅ㧘หᤨߦ࿑ 9 ߩ(d)߆ࠄᄖ๟౞㗔ၞߣㄭற㖸࿶ߣߪห⋧ߢ޽ࠆߣ್ᢿߐࠇ㧘ᄢㇱಽߩ㕙Ⓧࠍභ߼ࠆᄖ๟౞ㇱᝄേߣ㖸࿶߇ห⋧ߢ޽ࠆߎߣ߇ๆ㖸₸ૐਅߩේ࿃ߢ޽ࠆߣ⠨߃ࠆߎߣ߇ߢ߈ࠆ‫ޕ‬හߜ㧘ⓨ᳇ߩ☸ሶㅦᐲߣ᧼ᝄേߣߩ⋧ኻㅦᐲᏅߩૐਅ߇ๆ㖸₸ૐਅߩේ࿃ߢ޽ࠆߣផቯߐࠇࠆ‫ޕ‬ ߥ߅㧘▵✢߇ሽ࿷ߔࠆ႐วߦߪ㧘਄⸥ߩ⃻⽎ߩ⋧Ვ߇ห৻ᄙሹ᧼਄ߦ߅޿ߡ↢ߓ㧘⚿ᨐߣߒߡ㗼⪺ߥ⪭ߜㄟߺߦߪߥࠄߥ޿ߣ⠨߃ࠆߎߣ߇ߢ߈ࠆ‫ޕ‬㧚೙ᝄᕈઃടߩലᨐ

 ଏ⹜૕(b)㧘ଏ⹜૕(c)ߩࠃ߁ߦ㧘೙ᝄߔࠆߎߣߦࠃࠅᝄ

േࡕ࡯࠼ߪ࿑ 11 ߦ␜ߔ(1,0)ࡕ࡯࠼ߣߥࠆ߇㧘ๆ㖸₸ߩᄢ᏷ߥ⪭ߜㄟߺ߇⷗ࠄࠇࠆ 560Hz ઃㄭߢๆ㖸₸߇ᡷༀߔࠆ‫ޕ‬(a) Specimen (a)(b) Specimen (b)ߘߩℂ↱ߪ㧘࿑ 7 ߦߺࠄࠇࠆࠃ߁ߦᄙሹ᧼ߩᝄേߩᄢ᏷

ߥૐᷫߦࠃࠆ߽ߩߣ⸃ߐࠇࠆ‫ޕ‬ ߥ߅࿑ 12 ߦ㧘❑ゲߦଏ⹜૕ߩ⋥ᓘᣇะߩ૏⟎ࠍ㧘߹ߚ

Normalized Displacementߦ▵✢ࠍ᦭ߔࠆࡕ࡯࠼ߢ޽ࠆ(1,1)㧘(1,2)߇᷹ⷰߐࠇࠆ߇㧘࿑ 㧚೙ᝄᕈઃട೨ C ߣઃടᓟ D  E ߩᝄേࡕ࡯࠼Ყセ Normalized Displacement ࿑ 8 ߦ߅ߌࠆๆ㖸₸ߩዪᚲ⊛⪭ߜㄟߺ߇᷹ⷰߐࠇࠆ

315Hz㧘465Hz ߢߪ㧘ߘࠇߙࠇ࿑ 9 ߩ(b)㧘(c)ߦ␜ߔࠃ߁

(c) specimen(c)Normalized Displacement㧚  ࡕ࡯࠼ߢߩๆ㖸₸ߩዪᚲ⊛ૐਅ(b) specimen(b)(c) Specimen (c) ࿑ 㧚⋥ᓘᣇะߩᝄേಽᏓߩ๟ᵄᢙ․ᕈ㧔᷹ቯ୯㧕 adjacent sound pressure㧙㧙㪈Sound absorption coefficient㧢㧚ᓸ⚦ᄙሹ᧼ߩๆ㖸ࡄࡀ࡞߳ߩㆡ↪㪇㪅㪐㪇㪅㪏㪇㪅㪎㧚 ㋕㆏↪ๆ㖸ࡄࡀ࡞ 㪇㪅㪍 ࿑ 13 ߪᓸ⚦ᄙሹࠕ࡞ࡒ⭯᧼ࠍๆ㖸᧚ߣߔࠆ㋕㆏↪ๆ㖸ࡄࡀ࡞ߩ᭎⇛᭴ㅧߣᒻ⁁ኸᴺߢ޽ࠆ‫ߚ߹ޕ‬౮⌀ 2 ߪ㧘㪇㪅㪌ٟ measuredታ᷹୯㪇㪅㪋㪇㪅㪊⸘▚୯٤ calculated㪇㪅㪉゠㆏ౝ߳ߩขࠅઃߌ⁁ᴫࠍ␜ߔ‫ᧄ࡞ࡀࡄޕ‬૕ߪ㧘3 ጀߩ㪇㪅㪈ⓨ᳇ጀࠍ੺ߒߚ 3 ጀߩᄙሹ᧼᭴ㅧߣߥߞߡ޿ࠆ‫ޕ‬ ߎߩ㋕㆏ߩ೉ゞㅢㆊᤨ⊒↢㛍㖸ߩਥⷐᚑಽߪォേ㖸ߢ㪋㪇㪇㪇㪊㪈㪌㪇㪉㪌㪇㪇㪉㪇㪇㪇㪈㪍㪇㪇㪈㪉㪌㪇㪏㪇㪇㪈㪇㪇㪇㪍㪊㪇㪌㪇㪇㪋㪇㪇㪊㪈㪌㪉㪌㪇㪇㪈㪆㪊㪦㪺㫋㪅㪙㪸㫅㪻㩷㩿㪟㫑㪀࿑ 㧚ๆ㖸ࡄࡀ࡞ๆ㖸₸ߩ⸘▚୯ߣታ᷹୯Ყセ ޽ࠅ㧘400Hz㨪4kHz ߩ๟ᵄᢙᏪၞߩ㛍㖸࡟ࡌ࡞߇ᄢߢ޽ࠆߎߣࠍታ᷹࠺࡯࠲ߩ๟ᵄᢙಽᨆߦࠃࠅ⏕߆߼㧘ߘߩ๟ᵄᢙᏪၞߩๆ㖸ᕈ⢻߇ᦨᄢߣߥࠆࠃ߁㧘⸘▚ߦࠃࠅᓸ⚦ᄙሹ᧼ߩ᧼ෘ㧘ሹᓘ㧘㐿ญ₸㧘ⓨ᳇ጀෘߺࠍ᳿ቯߒߡ޿ࠆ‫ޕ‬෶㧘ᧄ㖸㗀ၮᧄ᭴ᚑࠍ㖸㗀▤ౝߦ⚵ߺㄟߺ㧘ု⋥౉኿ๆ㖸₸ࠍ⸘᷹ߒߡ⸘▚ߦࠃࠆ੍᷹୯ߣᲧセߒߚߩ߇࿑
14 ߢ޽ࠆ‫ߩ޿⁓ޕ‬๟ᵄᢙᏪၞߩᄢㇱಽߢๆ㖸₸ 0.9 એ਄߇㆐ᚑߐࠇߡ޿ࠆ‫ޕ‬ ߥ߅㧘ᧄๆ㖸ࡄࡀ࡞ࠍ࿷᧪✢ࠬ࡜ࡉ゠㆏ߢๆ㖸ಣℂ߇㪌㪇㪇㪇㪇㪋㪇㪇㪇㧔720g/m2㧕ࠃࠅ߽㜞޿ๆ㖸₸ߣシ㊂ൻ㧔400g/m2㧕߇㆐㪊㪈㪌㪇㜞๟ᵄᢙ㗔ၞߦ߅޿ߡ❫⛽♽ๆ㖸᧚ᢱߩߺࠍ૶߁႐ว

㪉㪌㪇㪇ㆡൻߔࠆ(7)ߎߣߦࠃࠅ㧘ห࿑ߦ␜ߔࠃ߁ߦ1000Hzએ਄ߩ㪉㪇㪇㪇วߔࠆࠃ߁ᓸ⚦ᄙሹᓘ㧘㐿ญ₸ߩ୯ࠍ⸘▚ߦၮߠ޿ߡᦨ

㪈㪍㪇㪇ߢ޽ࠆ‫♽⛽❫ޕ‬ๆ㖸᧚ߩ․ᕈࠗࡦࡇ࡯࠳ࡦࠬ㧘ෘߺߦㆡ㪈㪉㪌㪇ᓸ⚦ᄙሹๆ㖸⭯᧼ࠍ࿑15ߩࠃ߁ߦ㊀ߨߚࠛࡦࠫࡦࡈ࡯࠼㪈㪇㪇㪇 ౮⌀3ߪ㧘❫⛽♽ๆ㖸᧚ߩࠛࡦࠫࡦ஥ߩ⴫㕙ߦធߒߡ㪏㪇㪇ࠃࠆๆ㖸ᕈ⢻ߩะ਄ߣシ㊂ൻߣ߳ߩ⹜ߺߩ଀ࠍ␜ߔ‫ޕ‬㪍㪊㪇 ❫⛽♽ๆ㖸᧚ߩ਄㕙ߦᓸ⚦ᄙሹๆ㖸᧚ࠍ㊀ߨࠆߎߣߦ

㪌㪇㪇㧚ࠛࡦࠫࡦࡈ࡯࠼ࠗࡦࠪࡘ࡟࡯࠲߳ߩㆡ↪ᕈᬌ⸛  

㪋㪇㪇

㩷㪊㪈㪌

߇⏕⹺ߐࠇߚ䇯㩷㪉㪌㪇ૐᷫലᨐࠍ᳞߼㧘6.4dBA ߩᷫ㖸ലᨐ㧔ૐᷫലᨐ㊂⚂ 75%㧕㪉㪇㪇೨ᓟߩ೉ゞㅢㆊᤨߩታ᷹㛍㖸࡟ࡌ࡞୯ߩᏅ⇣㊂߆ࠄ㛍㖸 ౮⌀㧞゠㆏㒐㖸ოౝ㕙ߦ⸳⟎ߐࠇߚๆ㖸ࡄࡀ࡞ 
౮⌀㧟❫⛽♽ๆ㖸᧚ߦࠕ࡞ࡒᄙሹ▗ࠍ㊀ߨߚࡈ࡯࠼ࠗࡦࠪࡘ࡟࡯࠲
ᄙሹ▗30㱘m
400g/m2
㪈400g/m^2
㪇㪅㪐
GW32kg/m^310mm
㪇㪅㪏
5mmⓨ᳇ጀ㪇㪅㪎
㪇㪅㪍
720g/m2
720g/m^2
㪇㪅㪌
GW48kg/m^315mm
㪇㪅㪋㪇㪅㪊
㪇㪅㪉㪇㪅㪈
320g/m2ᱷ 㗀ቶ ᴺๆ 㖸₸
Sound absorption
coefficientᣉߐࠇߡ޿ߥ޿㒐㖸ოߩౝ㕙ߦ⸳⟎ߒ㧘ๆ㖸ࡄࡀ࡞⸳⟎

10mm
5mm

320g/m^2
GW32kg/m^3ⓨ᳇ጀ㪝㫉㪼㫈㫌㪼㫅㪺㫐㩷㪲㪟㫑㪴࿑㧚ᓸ⚦ᄙሹࠕ࡞ࡒ▗ߦࠃࠆシ㊂ൻߣ㜞ๆ㖸ᕈ⢻ൻ ᚑߢ߈ࠆߎߣࠍታ᷹ߦࠃࠅ⏕⹺ߒߚ‫ޕ‬ᓸ⚦ᄙሹࠕ࡞ࡒ᧼







౮⌀㧠ౝㇱߦᓸ⚦ᄙሹ᧼ࠍ⚵ߺㄟࠎߛࠕࡦ࠳࡯ࠞࡃ࡯㧔ਅ㕙߆ࠄ㧕࿑ 㧚㋕㆏↪ᓸ⚦ᄙሹๆ㖸ࡄࡀ࡞ߩ᭴ㅧ  ࿑ ࠕࡦ࠳࡯ࠞࡃ࡯ౝㇱߩ᭴ㅧ  㧙㧙㪍㪇 ᓸ⚦ᄙሹߩ᧚ᢱߣߒߡᯏ᪾⊛ᒝᐲ߿⠴୥ᕈߦఝࠇࠆ᧚㪌㪌ᢱࠍ↪޿ࠆߎߣߦࠃࠅ㧘੹ᓟߎࠇ߹ߢๆ㖸᧚ࠍ㈩⟎಴᧪㪪㪧㪣䇭㪲㪻㪙㪴㪌㪇ߥ߆ߞߚㇱ૏ߢߩ૶↪߿㧘࡝ࠨࠗࠢ࡞ᕈ߿シ㊂ᕈߩ㜞޿㪋㪌㪋㪇᧚ᢱࠍ↪޿ࠆߎߣߦࠃࠆ࿾⃿ⅣႺ⽶⩄シᷫ߳ߩነਈߥߤᄙሹ᧼㩷䉝䊮䉻䊷䉦䊋䊷
withperforated panel䊉䊷䊙䊦㩷䉝䊮䉻䊷䉦䊋䊷withoutperforatedpanel㪊㪌㪊㪇߇ᦼᓙߐࠇࠆ‫ޕ‬㪌㪇㪇㪇㪋㪇㪇㪇㪊㪈㪌㪇㪉㪌㪇㪇㪉㪇㪇㪇㪈㪍㪇㪇㪈㪉㪌㪇㪏㪇㪇㪈㪇㪇㪇㪍㪊㪇㪌㪇㪇㪋㪇㪇㪊㪈㪌㪉㪌㧤㧚ෳ⠨ᢥ₂㪝㫉㪼㫈㫌㪼㫅㪺㫐㩷㪲㪟㫑㪴࿑ ㆇォᏨ⡊ర㖸࿶࡟ࡌ࡞ 52. Ყセ ࠬࡇࠞ࡯ታ㛎(1) ↰ਛବశ㧘ጊ↰㓉ඳ㧘ጊᭂદ⍮㇢㧘ၳየᱜᴦ㧘᧻↰ 㧚 ਸ਼↪ゞࠕࡦ࠳࡯ࠞࡃ࡯߳ߩㆡ↪ᕈᬌ⸛ඳ㧦̌੤ㅢⅣႺ㛍㖸㕒☽ൻ߳ߩᣂᛛⴚ㐿⊒̍㧘␹ᚭ⵾ᐥⵣ㕙ߣ〝㕙ߩ㑆ߢ᭴ᚑߐࠇࠆ㖸႐ⓨ㑆߳ๆ㖸ᕈࠍઃ

㍑ᛛႎ㧘Vol.57㧘No1㧘Apr㧘p.32-36㧘2007

ടߔࠆᣇᴺߣߒߡ㧘࿑ 16 ߦ␜ߔ᭴ㅧߩゞ૕ࠕࡦ࠳࡯ࠞࡃ

(2) ጊ↰㓉ඳ㧘↰ਛବశ㧘ጊᭂદ⍮㇢㧘ၳየᱜᴦ㧘᧻↰࡯ࠍ⹜૞ߒ㧘ᐥⵣ㕙߳⸳⟎ߒߚ‫ࠍ࠭ࠗࡁ࠼࡯ࡠޕ‬ᮨᡆߒඳ㧦̌ᓸ⚦ᄙሹࠕ࡞ࡒ▗ߢ᭴ᚑߐࠇࠆๆ㖸ࡄࡀ࡞ߩ㐿⊒̍㧘ᣣᧄᯏ᪾ቇળ╙ 17 ࿁ⅣႺᎿቇ✚วࠪࡦࡐࠫ࠙ߡ〝㕙ߦ⸳⟎ߒߚࠬࡇ࡯ࠞ㖸Ḯ߆ࠄߩ㧘ᐥⵣ㕙ߣ〝㕙ߢࡓ⻠Ṷ⺰ᢥ㓸 2007㧘p39-41㧘2007᭴ᚑߐࠇࠆ㖸㗀ⓨ㑆ౝߢ෻㗀ߒ〝㕙ⓨ㑆ߩᄖ߳᡼಴ߐࠇ
ߚ㖸߇㧘⓹߆ࠄㅘㆊߒߡ౉ࠆㆇォᏨ⡊ర㖸ߩ㛍㖸ૐᷫലᨐࠍታ㛎ߦࠃࠅ᳞߼ߚ᷹ቯ⚿ᨐ߇࿑ 17 ߢ޽ࠆ‫ޕ‬ᄙሹ᧼᦭(3) K. Tsugihshi, T. Tanaka, H. Ueda㧦̌Development of atechnique to improve the sound insulation of double-leafwallsήߦࠃࠆ㖸࿶࡟ࡌ࡞ߩ⋧ኻ⊛Ꮕ⇣ࠍ࿑ 17 ߦᲧセߔࠆ‫⋡ޕ‬ᮡߩ⸳⸘๟ᵄᢙᏪၞߢ⚂ 4dB ߩૐᷫലᨐ㧔ૐᷫ㊂ 60%㧕withair-space

using microperforated

absorbing plate”, Proceedings of inter-noise 2006

sound߇ᓧࠄࠇߡ޿ࠆ‫߅ߥޕ‬㧘⴫㕙ߦߪ଻⼔ߩߚ߼ߩᲧセ⊛ᄢ(4) ↰ਛବశ㧘ఽ₹ാੱ㧘↳ ⋓ᾔ㧘ጊᭂદ⍮㇢㧦̌ๆ㖸߈ߥሹߣ㐿ญ₸ࠍᜬߟࠞࡃ࡯߿ᵆ᳓ߩឃ᳓ሹߥߤ߇⸳ߌᓸ⚦ᄙሹ⭯᧼㖸㗀ㅪᚑᝄേ♽ߩ᜼േ⸃᣿”㧘ᣣᧄᯏ᪾ࠄࠇߡ޿ࠆ‫ޕ‬ๆ㖸᧚ߪ৻⥸ߦ᳓ߦᒙ޿᧚ᢱ߇ᄙ޿߇㧘㊄ቇળ╙ 18 ࿁ⅣႺᎿቇ✚วࠪࡦࡐࠫ࠙ࡓ⻠Ṷ⺰ᢥ㓸

2008㧘p.29-31㧘2008ዻ᧚ᢱߥߤ᳓ߦᒝ޿⚛᧚ࠍ↪޿ࠆߎߣߦࠃࠅ㧘ߎࠇ߹ߢๆ㖸ᕈߩઃട߇࿎㔍ߥㇱ૏߳ߩㆡ↪ߩน⢻ᕈ߇㐿߆ࠇࠆ‫ޕ‬̌ๆ㖸ᓸ⚦ᄙሹ⭯(5) ⨲⧛᮸ብ㧘↰ਛବశ㧘ጊᭂદ⍮㇢㧦᧼㖸㗀ㅪᚑᝄേ♽ߩ᜼േ⸃᣿ ╙ੑႎ ࿕᦭ᝄേߩૐᷫߣๆ㖸ᕈ⢻ߩᡷༀ̍ᣣᧄᯏ᪾ቇળ╙ 19 ࿁ⅣႺᎿቇ㧣㧚߅ࠊࠅߦࠪࡦࡐࠫ࠙ࡓ 2009 ⻠Ṷ⺰ᢥ㓸㧘No.09-13, p.79-81,2009 ᓸ⚦ᄙሹࠍടᎿߒߚ⭯᧼߿▗ߣⓨ᳇ጀߣߢ᭴ᚑߐࠇࠆ

(6) H. Utsuno, T. Tanaka, and T. Fujikawa 㧦̌Transfer

function method for measuring charaacteristic impedanceๆ㖸᭴ㅧߦ߅޿ߡ㧘ߎࠇ߹ߢߦ᣿ࠄ߆ߦߐࠇߡ޿ߥ޿ᄙ

and propagation constant of porous materials”, J. Acoust.

ሹ᧼߇㖸㗀ㅪᚑᝄേߔࠆ႐วߩๆ㖸․ᕈߦߟ޿ߡᬌ⸛ࠍ

Soc. Am. , Vol.86, No2, p. 637-643, 1989ട߃ߚ‫ޕ‬㖸࿶ߦࠃࠅബᝄߐࠇࠆᓸ⚦ᄙሹ᧚ߩᝄേߣๆ㖸ᕈ⢻ߣ(7) ↰ਛବశ㧦̌ࠕ࡞ࡒ࠾࠙ࡓ᧚ᢱࠍ↪޿ߚ⥄േゞシ㊂ൻߩ㑐ㅪᕈࠍ㧘㕖ធ⸅ߢߩᄙሹ᧚ᝄേ⸘᷹ߣๆ㖸₸᷹ቯߣߣ㕒☽࡮ᔟ㖸ൻߩㅊ᳞̍㧘⥄േゞᛛⴚળ 2006 ᤐቄᄢߦࠃࠅ᣿ࠄ߆ߦߒ㧘ᰴߩ⚿ᨐࠍᓧߚ‫ޕ‬ળ ᧚ᢱࡈࠜ࡯࡜ࡓ⻠Ṷ㓸㧘p.22-25㧘2006Ԙᄙሹ᧚ߩ౒ᝄᝄേᤨߩๆ㖸₸ߩૐਅߪ㧘․ቯߩᝄേࡕ࡯࠼ߩ႐วߦᄢ߈ߊߥࠅ㧘☸ሶㅦᐲߣᄙሹ᧼ߣߩ⋧ኻㅦᐲᏅߩૐਅ߇ේ࿃ߣ⠨߃ࠄࠇࠆ‫ޕ‬ԙ೙ᝄᕈࠍઃടߔࠆߎߣߦࠃࠅ㧘ߘߩᄢ᏷ߥๆ㖸₸ૐਅࠍᡷༀߔࠆߎߣ߇ߢ߈ࠆ‫ޕ‬ߐࠄߦ㧘ᓸ⚦ᄙሹ᧚ߩ᦭↪ᕈߣ᦭ലᕈࠍ㧘Ԙᓸ⚦ᄙሹ⭯᧼ࠍㆡ↪ߒߚ㋕㆏↪㒐㖸ࡄࡀ࡞ԙᓸ⚦ᄙሹ▗ࠍㆡ↪ߒߚࠛࡦࠫࡦࡈ࡯࠼ࠗࡦࠪࡘ࡟࡯࠲Ԛᓸ⚦ᄙሹ⭯᧼ࠍㆡ↪ߒߚࠕࡦ࠳࡯ࠞࡃ࡯ߩ႐วߦߟ޿ߡ␜ߒߚ‫ޕ‬㧙㧙