ィ⟬⤖ᯝ࡜ᐇ㦂⤖ᯝࡢẚ㍑

ḟࡢTable5.2࡟ྛᐇ㦂᮲௳ࡢࣃ࣓࣮ࣛࢱࢆ♧ࡋ㸪Fig5.8Ң 5.10࡟ྛ᮲௳ୗ࡛ࡢไᚚ

Ⅼ(ㄗᕪ࣐࢖ࢡࣟ࣍ࣥ㸧ಙྕࡢ3࡜6࡟ࡘ࠸࡚㸪ィ⟬⤖ᯝ࡜ᐇ㦂⤖ᯝࡢẚ㍑ࢆ♧ࡍ㸬

ࡲࡓ㸪Table5.3࡟ࡣྛᅗࡢẚ㍑ᑐ㇟㸦ኚື್࡜ᅛᐃ್㸧࡟ࡘ࠸࡚♧ࡍ㸬ྛᅗ࡟♧ࡍ

Case0ࡣ㸪➨5.3.3⠇࡟࠾ࡅࡿᐇ㦂⤖ᯝࡢ㡢ᅽࢫ࣌ࢡࢺࣝࢆࢆ⾲ࡍ㸬Case1Ң 12ࡣྛ᮲

௳ୗ࡟࠾ࡅࡿࢩ࣑࣮ࣗࣞࢩࣙࣥ⤖ᯝࡢ㡢ᅽࢫ࣌ࢡࢺࣝࢆ⾲ࡍ㸬Fig.5.8࡛ࡣ㸪౑⏝࢔

ࣝࢦࣜࢬ࣒࡜Cˆ ࡣᅛᐃࡋ㸪Hࢆ200㸪600㸪1200[TAP]࡜ኚ໬ࡉࡏࡿ㸬Fig5.9࡟ࡘ࠸࡚

ࡣCˆ ࡢࡳኚືࢆ୚࠼ࡓ㸬Fig.5.10࡜Fig5.11࡛ࡣ㸪ྛࣇ࢕ࣝࢱH࡜Cˆ ࡢTAPࡀ㐪࠸㸪

࢔ࣝࢦࣜࢬ࣒ࡢࡳࢆኚ᭦ࡋ㸪ẚ㍑ࡍࡿ㸬

Table 5.2 : Conditions and size of filters

Condition Number H[TAP] Cˆ [TAP] algorithm Experiment case 0 200 200 6[(1-1)-3’] ch

̭ case 1 200 ̭ ̭

̭ case 2 600 200 6[(1-1)-3’] ch

̭ case 3 1200 ̭ ̭

̭ case 4 200 ̭ ̭

̭ case 5 600 500 6[(1-1)-3’] ch

Simulation case 6 1200 ̭ ̭

̭ case 7 200 200 ̭

̭ case 8 600 ̭ 6(1-1)-6 ch

̭ case 9 500 ̭

̭ case 10 200 200 ̭

̭ case 11 600 ̭ 6-6-6 ch

̭ case 12 500 ̭

Table 5.3 : Conditions and size of filters

Figure Fig.5.8 Fig.5.9 Fig.5.10 Fig.5.11

Cases 0,1,2,3,4 0,2,5 0,1,7,10 0,5,9,12

Fixed parameter Algorithm, ˆC Algorithm,H H:200, ˆC:200 H:600, ˆC:500

Variable parameter H Cˆ Algorithm Algorithm

ḟࡢFig㸬5.8࡟ࡣไᚚࣇ࢕ࣝࢱH㸪Fig㸬5.9࡟ࡣ␲ఝㄗᕪ⤒㊰Cˆ ࡢTAPᩘࢆኚ᭦

ࡋࡓ᮲௳࡛㸪ᮏ❶ࡢศᩓไᚚᡭἲ࡟ࡼࡿῶ㡢ᛶ⬟ࢆ♧ࡍ㸬

(UURU (UURU

$1&2))

$1&21

&DVH &DVH &DVH &DVH

Fig. 5.8 : The relative sound pressure spectrum at the error point and sound pressure spectrum at the fixed point under the condition of ANC ON and OFF in Case 0㸪 1㸪2 and 3

(UURU (UURU

$1&2))

$1&21

&DVH &DVH &DVH

Fig. 5.9 : The relative sound pressure spectrum at the error point and sound pressure spectrum at the fixed point under the condition of ANC ON and OFF in Case 0㸪2 and 5

(UURU (UURU

$1&2))

$1&21

&DVH &DVH &DVH &DVH

Fig. 5.10 : The relative sound pressure spectrum at the error point and sound pressure spectrum at the fixed point under the condition of ANC ON and OFF in Case 0㸪1㸪7 and 10

Fig. 5.11 : The relative sound pressure spectrum at the error point and sound pressure spectrum at the fixed point under the condition of ANC ON and OFF in Case 0㸪5㸪9 and 12

Fig㸬5.8ࡼࡾ㸪ᐇ㦂࡜ࢩ࣑࣮ࣗࣞࢩࣙࣥࡀྠ᮲௳ࡢሙྜ㸪ῶ㡢㔞ࡀ࡯ࡰ୍⮴ࡋ㸪ࢩ

࣑࣮ࣗࣞࢩࣙࣥࡢᩚྜᛶࡀ☜ㄆ࡛ࡁࡿ㸬ࡲࡓ㸪ไᚚࣇ࢕ࣝࢱHࡢTAPᩘ࡟ࡼࡿᛶ⬟

ࡣ࡯ࡰኚࢃࡽࡎ㸪ᑐ㇟࿘Ἴᩘࡢ㧗࿘Ἴഃ2[kHz]࡛ࡢቑ㡢ࡀ5[dB]⛬ᗘኚࢃࡿ㸬ࡼࡗ࡚

ไᚚࣇ࢕ࣝࢱࡢTAPᩘࡣ༑ศ㊊ࡾ࡚࠸ࡿ࡜⪃࠼ࡽࢀࡿ㸬

Fig.5.9ࡼࡾ㸪ᮏᡭἲࡢᐇ㦂᮲௳ࡢ␲ఝㄗᕪ⤒㊰Cˆ ࡢTAPᩘ࡛ไᚚ࡟ࡣ༑ศ㊊ࡾ࡚࠸

ࡿ࡜⪃࠼ࡽࢀࡿ㸬ࡲࡓ㸪Fig㸬5.8࡜Fig㸬5.9ࡼࡾ㸪ᮏᡭἲࡢᐇ㦂࡟࠾ࡅࡿྛࣇ࢕ࣝࢱ ࡢTAPᩘࡣ༑ศ࡞ῶ㡢ᛶ⬟ࢆᚓࡿࡇ࡜ࡀྍ⬟࡛࠶ࡿ㸬

⤖ᯝ㸪Fig㸬5.10࡜Fig㸬5.11ࡼࡾ㸪ᚑ᮶ᡭἲ࡜ྠ➼ࡢῶ㡢㔞ࢆ⥔ᣢࡋࡓࡲࡲ㸪ィ⟬࡟

౑⏝ࡍࡿ␲ఝㄗᕪ⤒㊰Cˆ ࡢᩘࢆῶࡽࡍࡇ࡜ࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓ㸬࡞

࠾㸪6-6-6ࡢࣇࣝࢳࣕࣥࢿࣝࢩࢫࢸ࣒࡜ẚ㍑ࡍࡿ࡜㸪ᮏᡭἲ࡜ᚑ᮶ᡭἲ࡜ࡶ࡟㸪2[kHz]

࡟࠾ࡅࡿῶ㡢ᛶ⬟ࡢຎ໬ࡀぢࡽࢀࡿࡀ༑ศ࡞ῶ㡢㔞ࢆᚓࡿࡇ࡜ࡀ࡛ࡁࡓ㸬

5.5 ⤖ゝ

ᮏ ❶ ࡛ ࡣAASࢆ ኱ つ ᶍ ໬ ࡍ ࡿ 㝿 ࡟ ࢩ ࢫ ࢸ ࣒ ࡢ ኱ つ ᶍ ໬ ࢆ 㜵 ࡄ ไ ᚚ ᪉ ἲ ࡜ ࡋ ࡚ 㸪 M[(1-1)-L] Filtered-X-LMS࢔ࣝࢦࣜࢬ࣒ࢆᥦ᱌ࡋࡓ㸬ୖグ࢔ࣝࢦࣜࢬ࣒ࡣ㸪M ࢳࣕ

ࣥࢿࣝࡢࢭࣝᩘࢆᚲせ࡜ࡍࡿሙྜࢆ᝿ᐃࡋ࡚࠾ࡾ㸪ྛAASࢭࣝࡣ᳨ฟ࣐࢖ࢡࣟ࣍ࣥ

1ࡘ㸪ไᚚࢫࣆ࣮࢝㸯ࡘ㸪ࡑࡋ࡚㏆ഐࡢㄗᕪ࣐࢖ࢡࣟ࣍ࣥLಶ࡟ࡼࡾไᚚ㸦1-1-Lࡢ FX-LMS㸧ࢆ⾜࠸㸪ྛࠎࡀ⊂❧࡟ไᚚࣇ࢕ࣝࢱࢆ㐺ᛂྠᐃࡍࡿᡭἲ࡛࠶ࡿ㸬ࡲࡓㄗᕪ

࣐࢖ࢡࣟ࣍ࣥࡣ㔜」ࡋ࡚౑⏝ࡋ࡚࠸ࡿࡓࡵL࡜⾲ࡋ㸪⥲ᩘࡣMಶ࡜ࡍࡿ㸬᭱⤊ⓗ

࡟㸪ྛࢭࣝࡣ㸯ࡘࡢ᳨ฟ࣐࢖ࢡࣟ࣍ࣥ࡜1ࡘࡢไᚚࢫࣆ࣮࢝ࢆ1ࡘࡢᅛᐃࡋࡓࣇ࢕ࣝ

ࢱ(1-1㸧࡟ࡼࡾࣇ࢕࣮ࢻࣇ࢛࣮࣡ࢻไᚚࡍࡿ㸬ࡇࡢᡭἲࡢ᭷ຠᛶࢆࢩ࣑࣮ࣗࣞࢩࣙࣥ

࡜6ࢳࣕࣥࢿࣝᐇ㦂ࢆ࡟ࡼࡾ☜ㄆࡋࡓ㸬ᐇ㦂࡛ࡣ⦪125[mm]ᶓ750[mm]ࡢ❆ࢆ〇స ࡋ㸪6ࡘࡢAASࢭࣝࢆ୪࡭ไᚚࡍࡿ㸬ࢩ࣑࣮ࣗࣞࢩ࡛ࣙࣥࡣᐇ㦂⿦⨨ࡢྛ✵㛫ࡢఏ 㐩㛵ᩘࢆィ ࡋࡓ್ࢆ౑⏝ࡋィ⟬ࢆ⾜࠸㸪௨ୗࡢ⤖ㄽࢆᚓࡓ㸬

࣭6[(1-1)-3’] FX-LMS࢔ࣝࢦࣜࢬ࣒ᐇ㦂࡟ࡼࡾ㸪ไᚚⅬ࡛ࡣ500[Hz]Ң 2[kHz]ࢆ10

Ң 20[dB]ῶ㡢ྍ⬟࡛࠶ࡾ㸪ไᚚⅬᚋ᪉ࡢᗈ⠊ᅖࡢ✵㛫ࡢῶ㡢ศᕸࡀ☜ㄆࡉࢀࡓ㸬

࣭ ̭ࢩ࣑࣮ࣗࣞࢱ࡟ࡼࡿ6[(1-1)-3’] FX-LMS࢔ࣝࢦࣜࢬ࣒ࡢィ⟬⤖ᯝ࡜ᐇ㦂⤖ᯝ ࡢᩚྜᛶࡀ☜ㄆࡉࢀࡓ㸬

࣭6[(1-1)-3’]FX-LMS࢔ࣝࢦࣜࢬ࣒࡛ࡣ㸪ไᚚࣇ࢕ࣝࢱࡢTAP㛗࡟ࡼࡾ㸪ไᚚྍ⬟

࿘Ἴᩘࡢ㧗࿘Ἴഃ࡛ࡢᙳ㡪ࡀ࠶ࡾ㸪ไᚚࣇ࢕ࣝࢱࡀ200TAP࡛ࡣ1200TAP࡜ࡃ

ࡽ࡭࡚2[kHz]࡛ࡢ5Ң 10[dB]ࡢῶ㡢ᛶ⬟ࡢຎ໬ࡀ⏕ࡌࡿ㸬

࣭6[(1-1)-3’]FX-LMS࢔ࣝࢦࣜࢬ࣒࡛ࡣ㸪␲ఝㄗᕪ⤒㊰ࣇ࢕ࣝࢱCˆࡢTAP㛗ࡢኚ

໬࡛ࡣᛶ⬟ࡢຎ໬ࡣⓎ⏕ࡋ࡞࠸㸬

࣭ ࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡾ㸪6[(1-1)-3’] FX-LMS࢔ࣝࢦࣜࢬ࣒௨እ࡟㸪ᚑ᮶ᡭἲࡢ 6(1-1)-6 FX-LMS࢔ࣝࢦࣜࢬ࣒࡜6-6-6FX-LMSࡢῶ㡢㔞ࡢẚ㍑ࡀྍ⬟࡜࡞ࡗࡓ㸬

࣭6[(1-1)-3’]FX-LMS࢔ࣝࢦࣜࢬ࣒ࡣ㸬6-6-6FX-LMS࡟ẚ࡭࿘Ἴᩘᖏᇦ࡛ࡣ1.5[kHz]

Ң 2[kHz]࡛5Ң 10[dB]ࡢຎ໬ࡀ⏕ࡌࡿ㸬

௨ୖࡢ⤖ᯝࡼࡾ㸪M[(1-1)-L] Filtered-X-LMS࢔ࣝࢦࣜࢬ࣒࡟ࡼࡿῶ㡢ຠᯝࡣ2000Hz(w/λ

=0.75㸧௜㏆࡛ࡢ5Ң 10dBࡢຎ໬ࡀ࠶ࡿࡶࡢࡢࢩࢫࢸ࣒ࡣᏳᐃࡋᗈ⠊ᅖ࡛ࡢῶ㡢ຠᯝ

ࢆᚓࡿࡇ࡜ࡀ࡛ࡁࡓ.ࡑࡢ⤖ᯝ㸪Fig.5.12࡟♧ࡍࡼ࠺࡟㸪ศᩓไᚚ࡟ࡼࡿྛࢭࣝ⊂❧

ไᚚࡀྍ⬟࡜࡞ࡾ㸪❆ࡀᣑ኱ࡋ࡚ไᚚࢭࣝࡀቑ࠼ࡓ❆࡟ࡘ࠸࡚ࡶ㸪኱つᶍ໬ࡋࡓ㝿 ࡢᨵၿᡭἲ࡜ࡋ࡚᭷ຠ࡛࠶ࡿࡇ࡜ࡀ᫂ࡽ࠿࡜࡞ࡗࡓ㸬

Fig. 5.12 : AAS window by decentralized system

➨ 6 ^❶

⥲ᣓ

̭⎔ቃព㆑ࡢ㧗ࡲࡾ࡟ࡼࡾ㸪⮬ື㌴࣭㕲㐨➼ࡢ஺㏻㦁㡢ࡸⓎ㟁ࣉࣛࣥࢺ࣭ᕤሙ➼࠿

ࡽࡢᕤሙ㦁㡢࠿ࡽᐙᗞ㟁ჾ〇ရ➼࡟⮳ࡿࡲ࡛ᵝࠎ࡞㟼⢔໬ࡀ⾜ࢃࢀ㸪ᵝࠎ࡞✀㢮ࡢ㦁 㡢࡟ᑐࡋ࡚㦁㡢పῶࡀᮃࡲࢀ࡚࠸ࡿ㸬ࡑࡢ⤖ᯝ㸪ᶵᲔ࡞࡝ࡢ㡢※⮬యࡢ㟼㡢໬㸪ཷ

ࡅᡭഃࡢᑐ⟇ࡀ㐍ࡳࡘࡘ࠶ࡿࡀ㸪㟼⢔ᛶ࡟ຍ࠼࡚┬࢚ࢿࣝࢠ࣮ᛶࡸᛌ㐺࡞㡢㡪✵㛫

࡟ᑐࡍࡿせᮃࡀቑ࠼㸪㧗ᗘ࡞㦁㡢ᑐ⟇ᢏ⾡ࡀせồࡉࢀ࡚࠸ࡿ㸬ࡑࡢ୰࡛ࡶ㸪ぢ㏻ࡏ

ࡿሙᡤ࠿ࡽ⪺ࡇ࠼ࡿ㦁㡢ࡢపῶࡀᣲࡆࡽࢀࡿ㸬ලయⓗ࡟ࡣ㸪❆࠿ࡽධࡿ㦁㡢ࢆ❆ࢆ

㛢ࡵࡎ࡟㟼࠿࡟ࡋࡓ࠸࡜࠸࠺せᮃ࡛࠶ࡿ㸬ࡑࡢゎỴ᪉ἲ࡜ࡋ࡚ᮏ◊✲࡛ࡣ㸪㡢࡛㡢

ࢆไᚚࡍࡿ㸪⬟ື㦁㡢ไᚚ㸦Active Noise Control :ANC)ࢆ฼⏝ࡋࡓ㸪ࠕ㢼ࡣ㏻ࡍࡀ㡢 ࡣ㏻ࡉ࡞࠸❆ࠖࡢᐇ⌧ࢆ┠ᶆ࡜ࡋࡓ㸪࢔ࢡࢸ࢕ࣈ㡢㡪ࢩ࣮ࣝࢹࣥࢢ(Active Acoustic

Shielding:AAS)ࢆᥦ᱌ࡋࡓ㸬̭ᮏㄽᩥ࡛ࡣ㸪ᥦ᱌ࡋࡓAASࡢࢥࣥࢭࣉࢺ࡜⌮ㄽࢆド

᫂ࡍࡿࡓࡵ㸪ࢩ࣑࣮ࣗࣞࢩࣙࣥ࡜ᐇ㦂࡟ࡼࡾ᳨ドࡋ㸪ᐇ⌧ᛶࢆ᫂ࡽ࠿࡟ࡋࡓ㸬ࡲࡓ AASࢆᐇ⏝ࡍࡿ࡟࠶ࡓࡾၥ㢟࡜࡞ࡿ㸪ᑐ㇟ྍ⬟࡞࿘Ἴᩘᖏᇦ࡟ࡘ࠸࡚ࡢᨵၿᡭἲࢆ

ᥦ᱌ࡋ㸪ᐇ㦂࡟ࡼࡾຠᯝࢆ᳨ドࡋࡓ㸬᭱ᚋ࡟㸪ࡶ࠺୍ࡘࡢၥ㢟࡜ࡋ࡚㸪❆ࡢࢧ࢖ࢬ ࡀኚࢃࡗࡓ㸦኱つᶍ໬ࡋࡓ㸧ሙྜ㸪ศᩓไᚚࢆ౑⏝ࡋࡓM[(1-1)-L]Filtered-X-LMS࢔

ࣝࢦࣜࢬ࣒࡟ࡼࡾࢩࢫࢸ࣒ࡢ」㞧࣭኱つᶍ໬ࢆ㜵ࡄᡭἲࢆᥦ᱌ࡋ㸪ࢩ࣑࣮ࣗࣞࢩࣙ

ࣥ࡜ᐇ㦂࡟ࡼࡾ㸪ࡑࡢῶ㡢ᛶ⬟ࢆ᳨ドࡋࡓ㸬

➨1❶࡛ࡣ㸪◊✲ࡢ⫼ᬒ࣭ὶࢀ࣭ᴫせࡑࡋ࡚AASࡢࢥࣥࢭࣉࢺ࡟ࡘ࠸࡚㏙࡭ࡓ㸬➨

2❶࡛ࡣ㸪ࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡾ⌮ㄽⓗ࡞ῶ㡢ຠᯝࢆィ⟬ࡋ㸪✵㛫ࡢῶ㡢ศᕸࢆண  ࡋࡓ㸬ࣔࢹࣝࡣ3ḟඖ✵㛫࡜ࡋ㸪୍ḟ㡢※(㦁㡢㸧ࢆἼ㛗λ㹙m㹛ࡢᖹ㠃Ἴ࡜ࡋ㡢ᅽ

ࢆ୚࠼㸪xyᖹ㠃࡟ࡣไᚚ⏝ࡢⅬ㡢※ࢆ᱁Ꮚ≧࡟w㹙m㹛㛫㝸࡛㓄⨨ࡋᚋ᪉d㹙m㹛఩

⨨㸦ไᚚⅬ㸧࡛ࡢ㡢ᅽࡀ0࡜࡞ࡿࡼ࠺࡟ಙྕࢆ୚࠼ࡓ㸬ᐇ㦂᮲௳࡜ࡋ࡚㸪λ㸪dࢆw

࡛㝖⟬ࡋࡓ↓ḟඖ್࡟ᩚ⌮ࡋࡓ್ࢆኚືࡉࡏ㸪ࡉࡽ࡟୍ḟ㡢※ࡢධᑕゅθ࡟ࡘ࠸࡚

ࡶẚ࡭ࡓ㸬⤖ᯝ㸪ไᚚⅬᚋ᪉ࡢᗈ⠊ᅖ࡛ࡢῶ㡢ศᕸࡀ☜ㄆࡉࢀ㸪ไᚚ㡢※ࡢ㓄⨨࡜

ᑐ㇟ྍ⬟࡞Ἴ㛗࡜ࡢ㛵ಀࡣw/λ ≤ 0.5㸪ไᚚⅬ఩⨨࡟ࡘ࠸࡚ࡣd/w=1௨ୖ࡛㸪ධᑕ ゅᗘ࡟ࡘ࠸࡚ࡣθ≤60[deg]࡛ࡢῶ㡢ࡀྍ⬟࡛࠶ࡿࡇ࡜ࡀண ࡉࢀࡓ㸬

➨3❶࡛ࡣ㸪2❶ࡢ⤖ᯝࢆࡶ࡜࡟ᑠᆺࡢAAS❆ࢆసᡂࡋ㸪ṇ㠃ධᑕ㡢※㸪ᩳࡵධᑕ 㡢※㸪」ᩘ㡢※㸪⛣ື㡢※㸪ᐊෆࡢ཯ᑕ㡢㸪ෆ㒊㡢※࡟ࡘ࠸࡚ࣔࢹࣝࢆసᡂࡋ㸪ࣔ

ࢹࣝヨ㦂ࢆ⾜ࡗࡓ㸬ࡑࡢ⤖ᯝ㸪ྛ᮲௳ୗ࡛ࡢῶ㡢ຠᯝ㸪ῶ㡢ศᕸࢆᚓࡿࡇ࡜ࡀ࡛ࡁ㸪 AASࡢ᭷⏝ᛶࢆ☜ㄆࡍࡿࡇ࡜ࡀ࡛ࡁࡓ㸬

➨4❶ࡢప࿘Ἴᖏᇦࡢᛶ⬟ᨵၿ࡟࠾࠸࡚ࡣ㸪ప࿘Ἴ⏝ࣘࢽࢵࢺ࡜㧗࿘Ἴ⏝ࣘࢽࢵࢺ

ྠ᫬సື࡟ࡼࡗ࡚300[Hz]Ң 2[kHz]ࡢᖏᇦ࡛5Ң 18[dB]ࡢῶ㡢ຠᯝࢆᚓࡿࡇ࡜ࡀ࡛ࡁ㸪

┠ᶆࡢ500[Hz]௨ୗࡢῶ㡢ᛶ⬟ࡢᨵၿࡀྍ⬟࡜࡞ࡗࡓ㸬ࡲࡓ㸪ྠ୍໬ࣇ࢕ࣝࢱࡢᐇ㦂

࡛ࡶྠᵝ࡞⤖ᯝࢆᚓࡓ㸬ࡋ࠿ࡋ㸪ప࿘Ἴ⏝㸪㧗࿘Ἴ⏝㸪ࢯࣟࡒࢀ༢⊂࡛ࡢῶ㡢ຠᯝ

࡟ẚ࡭㸪୧⪅ࢆྠ᫬࡟సືࡋࡓሙྜࡢῶ㡢ຠᯝ࡟ࡣຎ໬ࡀぢࡽࢀࡿ㸬ࡑࡇ࡛㸰✀㢮 ࡢAASࣘࢽࢵࢺᮏ᮶ࡢᛶ⬟ࢆ᭱኱㝈࡟ࡍࡿࡓࡵ࡟ࡣ㸪౽ᐅⓗ࡟౑⏝ࡋࡓ2ࣘࢽࢵࢺ

ࢆྠ᫬࡟ไᚚࡍࡿᡭἲࡢᨵၿ࡜ࡋ࡚㸪ྛࣘࢽࢵࢺࡢࢡࣟࢫࢺ࣮ࢡᡂศࢆ⪃៖ࡋࡓᡭ ἲࡀᚲせ࡛࠶ࡿ㸬

➨5❶ ࡛ ࡣAASࢆ ኱ つ ᶍ ໬ ࡍ ࡿ 㝿 ࡟ ᚲ せ ࡜ ࡞ ࡿ ไ ᚚ ᪉ ἲ ࡜ ࡋ ࡚ 㸪M[(1-1)-L]

Filtered-X-LMS࢔ࣝࢦࣜࢬ࣒ࢆᥦ᱌ࡋࡓ6ࢳࣕࣥࢿࣝAASࣔࢹࣝࢆ〇సࡋ㸪᪂ᡭἲ

ࡢ᭷ຠᛶࢆᐇ㦂ⓗ࡟᳨ドࡋࡓ㸬ࡲࡓ㸪ࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡗ࡚㸪ไᚚⅬ࡟࠾ࡅࡿῶ 㡢ຠᯝࢆ㸪௚ᡭἲ࡜ẚ㍑᳨᳨࣭ウࡋ㸪᪂ᡭἲࡢ᭷ຠᛶࢆ᳨ドࡋࡓ㸬⤖ᯝ㸪ྛไᚚࢭ

ࣝࢆ⊂❧࡟ไᚚࡍࢀࡤྛࢭࣝ࡟ᚲせ࡞ఏ㐩㛵ᩘࢆ㐺ᛂྠᐃ࡛ࡁࡿᡭἲ࡜࡞ࡾ㸪ࢭࣝ

ᩘࡀቑ࠼ࡓ࡜ࡋ࡚ࡶྛࢭࣝࡣ1-1-LࡢFiltered-X-LMS࢔ࣝࢦࣜࢬ࣒ࡢไᚚ࡛ᗈ࠸ῶ 㡢ศᕸࢆᚓࡿࡇ࡜ࡀྍ⬟࡜࡞ࡗࡓ㸬

௨ୖࡼࡾ㸪ㄢ㢟࡜ࡋ࡚ᣲࡆࡓ㸪᳨ฟ࣐࢖ࢡࣟ࣍ࣥ࡜ไᚚࢫࣆ࣮࢝఩⨨࡟ࡼࡿྠ୍

఩⨨໬࡜㸪ᐇ㝿ࡢ㓄⨨㊥㞳࡟ࡼࡿᙳ㡪࡟ࡘ࠸࡚ࡣ㸪ᩳࡵධᑕ㡢※࡟࠾࠸࡚㸪ྠ୍఩

⨨࡜ࡍࡿሙྜ࡜ࡢ㊥㞳ᕪ࡟ࡼࡾ㸪⏕ᡂࡍࡿ㡢ἼࡢἼ㠃ࡀ㦁㡢࡜࡞ࡿ㡢ἼࡢἼ㠃࡜ࡎ

ࢀࡀ⏕ࡌ㸪ῶ㡢ຠᯝࡢⱝᖸࡢຎ໬ࡀ☜ㄆࡉࢀࡓࡀ㸪඲యⓗ࡟ࡣ༑ศ࡞ῶ㡢ຠᯝࢆᚓ

ࡿࡇ࡜ࡀ࡛ࡁࡓ㸬ࡲࡓ㸪㧗ࢧࣥࣉࣜࣥࢢ࿘Ἴᩘࢆ౑࠺ࡇ࡜࡛㸪᳨ฟ࣐࢖ࢡࣟ࣍ࣥ࡜

ไᚚࢫࣆ࣮࢝ࢆ㏆㊥㞳࡟㓄⨨ࡋ࡚ࡶ㸪ᅉᯝᚊࢆ‶ࡓࡍࡇ࡜ࡀྍ⬟࡜࡞ࡗࡓ㸬

ῶ㡢ྍ⬟࡞ᑐ㇟࿘Ἴᩘᖏᇦf࡟ࡘ࠸࡚ࡣ㸪2✀㢮ࡢࣘࢽࢵࢺࢆྠ᫬࡟⊂❧࡟ไᚚࡍ

ࡿᡭἲ࡟ࡼࡾప࿘Ἴᡂศࡢᛶ⬟ᨵၿࡀྍ⬟࡜࡞ࡗࡓ㸬

ࡑࡋ࡚㸪ไᚚࢭࣝࡢᩘࡀቑຍ࡟ࡼࡿࢩࢫࢸ࣒ࡢ」㞧࣭኱つᶍ໬㜵Ṇ࡟ࡘ࠸࡚ࡣ㸪

ྛࢭࣝࡀ⊂❧࡟ไᚚࡉࢀ㸪㏆ഐࡢไᚚⅬࢆᑐ㇟࡟ࡍࡿศᩓไᚚᡭἲࢆ౑⏝ࡍࡿࡇ࡜

࡛㸪AASࡢᛶ⬟ࢆຎ໬ࢆᢚ࠼㸪ከࢳࣕࣥࢿࣝไᚚ࡜ྠ➼ࡢῶ㡢ຠᯝ࣭ศᕸࢆᚓࡿࡇ

࡜ࡀ࡛ࡁࡓ㸬

௒ᚋࡢㄢ㢟࡜ࡋ࡚ࡣ㸪ࡲࡎ㸪᳨ฟ࣐࢖ࢡࣟ࣍ࣥ࡜ไᚚࢫࣆ࣮࢝ࡢ㊥㞳ࢆࡼࡾ㏆࡙

ࡅࡿࡇ࡜࡛㸪ᩳࡵධᑕ㡢※࡟ᑐࡍࡿᛶ⬟ࢆྥୖࡍࡿᚲせࡀ࠶ࡿ㸬ࡑࡢࡓࡵ㸪ࡼࡾ㧗

㏿࡞ಙྕฎ⌮ࢆྍ⬟࡜ࡍࡿࢥࣥࢺ࣮ࣟࣛ㛤Ⓨࡀᚲせ࡛࠶ࡾ㸪FPGAࢆ⏝࠸ࡓ㧗㏿ಙ

ྕฎ⌮࣮࣎ࢻ㛤Ⓨࡀ⾜ࢃࢀ࡚࠸ࡿ[52]㸬ࡲࡓ㸪㧗ࢧࣥࣉࣜࣥࢢ࿘Ἴᩘࢆ౑࠺ࡇ࡜࡛☜

ಖ࡛ࡁ࡞࠿ࡗࡓ࢖ࣥࣃࣝࢫᛂ⟅ࡢࣇ࢕ࣝࢱ㛗ࡉࡶ㸪FPGA࡟ࡼࡾᨵၿࡉࢀప࿘Ἴᖏ ᇦࡢᛶ⬟ࡀྥୖࡍࡿ[51]㸬ࡼࡗ࡚㸪FPGAࡢ㛤Ⓨ࡜ᬑཬ࡟ࡼࡾ኱ᖜ࡞ᨵၿࡀぢ㎸ࡲࢀ

ࡿ㸬ḟ࡟㸪ᑐᛂྍ⬟࡞࿘Ἴᩘᣑ኱ࡢㄢ㢟࡜ࡋ࡚ࡣ㸪ࡼࡾᑠᆺ࠿ࡘప࿘ἼࡢⓎ㡢ᛶ⬟

ࡢ㧗࠸ࢫࣆ࣮࢝ࡢ㛤Ⓨࡀᚲせ࡛࠶ࡿ㸬ࡉࡽ࡟ᮏㄽᩥ࡛Ⓨ᱌ࡋࡓ2✀㢮ࡢࣘࢽࢵࢺࢆ

౑⏝ࡍࡿᡭἲࡢไᚚ᪉ἲࢆᨵၿࡍࡿᚲせࡀ࠶ࡿ㸬ࡲࡓ㐺ษ࡞ྛࣘࢽࢵࢺࡢ㐺ษ࡞ᑐ

ᛂ࿘Ἴᩘࡢ㑅ᐃ㸦ࢭࣝ㛫㝸࡜ࢫࣆ࣮࢝㸧ࡀᚲせ࡜࡞ࡿ㸬᭱ᚋ࡟㸪ᮏㄽᩥ࡛Ⓨ᱌ࡋࡓ㸪 ࢩࢫࢸ࣒ࡢ኱つᶍ໬ࢆ㜵ࡄAASศᩓไᚚᡭἲ࡟ࡘ࠸࡚ࡣ㸪5❶ᮎ࡟♧ࡋࡓFig.5.12

ࡼ࠺࡟㸪ᮏ᮶ࡢ㓄⨨࡛࠶ࡿ᱁Ꮚ≧࡟୪࡭㸪኱ᆺࡢ❆࡟㐺ᛂࡍࡿࡇ࡜ࢆ┠ᣦࡍ㸬ࡑࡢ ࡓࡵ㸪M[(1-1)-L]Filtered-X-LMS࢔ࣝࢦࣜࢬ࣒ࡢL㒊ศࡣቑࡸࡍᚲせࡀ࠶ࡾ㸪Lࡢ 㑅ᐃ㸦㏆ഐࡢㄗᕪಙྕࢆ࡝ࡇࡲ࡛ᑐ㇟࡜ࡍࡿ࠿㸧㸪ไᚚࢭࣝࡢຠ⋡ⓗ࡞㓄⨨᪉ἲ࡞

࡝᳨ウࡍࡿᚲせࡀ࠶ࡿ㸬ࡉࡽ࡟㸪ࢩࢫࢸ࣒ࡢ኱つᶍ໬ࢆ㜵ࡄᡭἲ࡜ࡋ࡚㸪❆ᯟ࿘㎶

࡜୰ኸ㒊௜㏆࡛ࡢไᚚࣇ࢕ࣝࢱࡢ཰᮰್㸦ᅛᐃࣇ࢕ࣝࢱ㸧ࢆồࡵ㸪ሙᡤ࡟ࡼࡾ✀㢮 ࡢ㐪࠺ྠ୍ᅛᐃࣇ࢕ࣝࢱࢆ౑⏝ࡍࡿ᪉ἲ࡟ࡼࡾ㸪㐺ᛂྠᐃ㒊ศࡢ┬␎࡛ࡁࡿྍ⬟ᛶ ࡀᣲࡆࡽࢀࡿ㸬ࡇࢀࡽ࡟ࡘ࠸࡚ࡶ᳨ウࡋ࡚࠸ࡃᚲせࡀ࠶ࡿ㸬

̭ᮏ◊✲ࢆ㐙⾜ࡍࡿ࡟࠶ࡓࡾ㸪◊✲᪉㔪ࢆ୚࠼࡚࠸ࡓࡔࡁ㸪࠸ࡘࡶ୎ᑀ࡞ࡈᣦᑟ㸪 ࡈᣦ᦬ࢆ࠸ࡓࡔ࠸ࡓすᮧṇ἞≉௵ᩍᤵ㸪す⏣ಙ୍㑻ᩍᤵ,ᚋ⸨▱ఙᩍᤵ࡞ࡽࡧ࡟ᱜ㛫

୍ᚨ෸ᩍᤵ࡟῝ࡃឤㅰ࠸ࡓࡋࡲࡍ㸬

ࡲࡓ㸪ᬑẁ࠿ࡽከࠎᚚ༠ຊ࠸ࡓࡔࡁࡲࡋࡓไᚚ࣭ࣟ࣎ࢸ࢕ࢡࢫ◊✲ᐊࡢⓙᵝ࡟ᑐ ࡋ࡚㸪ᚰ࠿ࡽᚚ♩⏦ࡋୖࡆࡲࡍ㸬

ཧ⪃ᩥ⊩

[1] ♫ᅋἲே᪥ᮏ㦁㡢ไᚚᕤᏛ఍⦅͆ 㦁㡢⏝ㄒ஦඾ ͇(ᰴ㸧ᢏሗᇽฟ∧㸦2010㸧 [2] ஂ ಖ ⚈ ୕ 㸪ᮌ ᮧ ோ ⨾ 㸪͆ ஺ ㏻ 㦁 㡢 ၥ 㢟 ࡬ ࡢ ⾜ ᨻ ⓗ ྲྀ ࡾ ⤌ ࡳ ͇᪥ ᮏ 㡢 㡪 Ꮫ ఍ ㄅ 㸪

Vol.66㸪No.11㸪pp.555-558㸦2010㸧

[3] ᒣ⏣୍㑻㸪͆ ⎔ቃ㦁㡢࡜ࡋ࡚ࡢ⯟✵ᶵ㦁㡢ࡢၥ㢟࡬ࡢྲྀࡾ⤌ࡳ ͇᪥ᮏ㡢㡪Ꮫ఍

ㄅ㸪Vol.66㸪No.11㸪pp.565-570㸦2010㸧

[4] 㛗಴Ύ㸪͆㕲㐨㦁㡢ၥ㢟࡬ࡢྲྀࡾ⤌ࡳ͇᪥ᮏ㡢㡪Ꮫ఍ㄅ㸪Vol.66㸪No.11㸪pp.571-576 㸦2010㸧

[5] ⎔ ቃ ┬ Ỉ࣭኱ Ẽ ⎔ ቃ ᒁ ኱ Ẽ ⏕ ά ⎔ ቃ ᐊ 㸪͆ ᖹ ᡂ24ᖺ ᗘ 㦁 㡢 つ ไ ἲ ᪋ ⾜ ≧ ἣ ㄪ ᰝ ࡟ ࡘ ࠸ ࡚ ͇㸪⎔ ቃ ┬ ࣍ ࣮ ࣒ ࣌ ࣮ ࢪ(2014)㸪㸦 ᭱ ⤊ 㜀 ぴ ᪥2014ᖺ12᭶17᪥ 㸧 http://www.env.go.jp/air/noise/kujou h24/index.html

[6] 㛛ᒇ┿ᕼᏊ,ሷ⏣ṇ⣧㸪͆ ᘓタసᴗ᣺ືࡢ⌧≧࡜ࡑࡢືྥ̭ࡑࡢ㸯ᘓタసᴗ᣺ື

ࡢཎᅉ࡜௒ᚋࡢㄢ㢟࡟ࡘ࠸࡚ ͇᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ24ᖺ⛅Ꮨ◊✲Ⓨ⾲఍ㅮ

₇ㄽᩥ㞟㸪pp.145-148㸦2012㸧

[7] ኱ᓥᜨ㸪⮬ື㌴ࡢప㦁㡢໬࡬ࡢྲྀࡾ⤌ࡳ ͇㦁㡢ไᚚ㸪Vol.27㸪No.6㸪pp.399-406 㸦2003㸧

[8] ᢲ㔝ᗣኵ㸪͆ ㌴୧㸪ࢱ࢖ࣖ㸪㐨㊰ࡢ㦁㡢పῶᑐ⟇ࡢ」ྜຠᯝ ͇㦁㡢ไᚚ㸪Vol.27㸪 No.6㸪pp.418-422㸦2003㸧

[9] ᒾ℩᫛㞝㸪ୖ⏣㯞㔛㸪᳜⏣▱Ꮥ㸪ᒸ⏣ᜤ᫂㸪⏣㏆㍤ಇ㸪⚟ᓥ᫛๎㸪͆ 㐨㊰㦁㡢ᑐ

⟇ࡢ࠶ࡺࡳ࠿ࡽࡳࡓ㟼㡢㌴୧ࡢᙳ㡪࡟ࡘ࠸࡚ ͇᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ22ᖺ⛅

Ꮨ◊✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟㸪pp.1-4㸦2010㸧

[10] ࣁ࢖ࣈࣜࢵࢻ㌴➼ࡢ㟼✜ᛶ࡟㛵ࡍࡿᑐ⟇᳨ウጤဨ఍,͆ ࣁ࢖ࣈࣜࢵࢻ㌴➼ࡢ㟼✜

ᛶ࡟㛵ࡍࡿᑐ⟇࡟ࡘ࠸࡚㸦ሗ࿌㸧͇,pp.1-3(2010)

[11] ᒣෆ຾ஓ,͆ ࣁ࢖ࣈࣜࢵࢻ㌴࣭㟁Ẽ⮬ື㌴࡞࡝ࡢ㟼㡢ᛶᑐ⟇ࡢືྥ-㌴୧᥋㏆ሗ▱

㡢ࡢࢹࢨ࢖ࣥ-͇,᪥ᮏ㡢㡪Ꮫ఍ㄅ㸪Vol.68, No.1, pp.31-36㸦2012㸧

[12] ໭ ᕝ ᩄ ᶞ 㸪㛗 ಴ Ύ 㸪͆ 㕲 㐨 㦁 㡢 ࡟ ࠾ ࡅ ࡿ ఏ ᦙ ⣔ᑐ ⟇ ͇᪥ ᮏ 㡢 㡪 Ꮫ ఍ ㄅ 㸪Vol.68㸪 No.12㸪pp.622-627㸦2012㸧

[13] ๓ᕝ⣧୍㸪͆ 㞀ቨ㸦ቨ㸧ࡢ㐽㡢タィ࡟㛵ࡍᐇ㦂ⓗ◊✲ ͇㸪᪥ᮏ㡢㡪Ꮫ఍ㄅ㸪Vol.18㸪 No.4㸪pp.187-196㸦1962㸧

[14] ᒾ ℩ ᫛ 㞝 㸪͆ ྾ 㡢 ᮦ 㔞 ࡢ ≉ ᛶ ࡜ ࡑ ࡢ ࡶ ࠺ ୍ ㄞ ࡳ ͇㸪㦁 㡢 ไ ᚚ 㸪Vol.36㸪No.4㸪 pp.243-248㸦2012㸧

[15] すᮧṇ἞㸪ᏱబᕝẎ㸪ఀໃྐ㑻͆ ࢔ࢡࢸ࢕ࣈࣀ࢖ࢬࢥࣥࢺ࣮ࣟࣝ ͇,᪥ᮏ㡢㡪Ꮫ

఍⦅̭㡢㡪ࢸࢡࣀࣟࢪ࣮ࢩ࣮ࣜࢬ9㸦2006㸧

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͇,J.Sound and Vib.,Vol.80,pp.373-380(1983)

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[24] H.Iwata㸪M.Nishimura㸪F.Aoi㸪M.Abe and S.Watabe㸪͆Development of active noise control duct system͇,Proc. of International Symposium on Active Control of Sound Vibration,pp.493-496(1991)

[25] M.Nishimura,͆Some problems of active noise control for paractical use͇,Proc. of International Symposium on Active Control of Sound Vibration㸪pp.157-164(1991)

[26] 㜿㒊┿୍㸪ᰩᰨΎᾈ,͆IPP࢞ࢫࢱ࣮ࣅࣥ᤼Ẽ㡢➼ࡢANC࡟ࡼࡿపῶ ͇,㦁㡢ไ ᚚ,Vol.27㸪No.4㸪pp.247-251㸦2003㸧

[27] ஭ୖᩄ㑻㸪㧗ᶫᙲ㸪బ㔝ஂ,͆ ప࿘Ἴ࣮ࣟࢻࣀ࢖ࢬࡢ࢔ࢡࢸ࢕ࣈไᚚࢩࢫࢸ࣒ࡢ 㛤Ⓨ ͇,⮬ື㌴ᢏ⾡఍Ꮫ⾡ㅮ₇఍๓ๅ㞟㸪No.111-00(20005554), pp.13-16(2000) [28] ஭ୖᩄ㑻㸪㧗ᶫᙲ㸪బ㔝ஂ,͆ 㐺ᛂࣀࢵࢳࣇ࢕ࣝࢱࢆᛂ⏝ࡋࡓ࢔ࢡࢸ࢕ࣈࡇࡶࡾ

㡢ไᚚࢩࢫࢸ࣒ࡢ㛤Ⓨ ͇㸪⮬ື㌴ᢏ⾡఍Ꮫ⾡ㅮ₇఍๓ๅ㞟㸪No.84-03(20035578)㸪 pp.1-4(2003)

[29] ஭ୖᩄ㑻,͆ ⮬ື㌴࡬ࡢᶆ‽㐺⏝ࢆᐇ⌧ࡋࡓ㌴ᐊෆ㡢ࡢ㦁㡢ไᚚᢏ⾡ ͇㸪㦁㡢ไ ᚚ㸪Vol.34㸪No.5㸪pp.336-341(2010)

[30] ᰘ⏣຾ᙪ,ୖ㔝⠜㸪ᯇᓮඞஓ㸪ᒣᮏᆂᏊ㸪すᮧṇ἞㸪᪂஭㝯⠊͆ ࣊ࣜࢥࣉࢱ࣮ᶵ ෆ㡢ࡢ࢔ࢡࢸ࢕ࣈ㡢㡪ไᚚ ͇,᪥ᮏ⯟✵ᏱᐂᏛ఍➨30ᅇ㛵す୰㒊ᨭ㒊ྜྠ⛅Ꮨ኱

఍ㅮ₇ㄽᩥ㞟㸪(1991)

[31] H.Sano㸪͆Modern advancements in passive and active noise and vibratiion control thechnology in automobiles͇,Proc. of Inter noise 2011㸪CD-ROM(2011)

[32] ᏱబᕝẎ㸪すᮧ⩏㝯㸪ⱛᮌ⚞ྐ,͆DXHS࢔ࣝࢦࣜࢬ࣒࡟ࡼࡿᩆᛴ㌴㟁Ꮚࢧ࢖ࣞ

ࣥ㡢ࡢไᚚ ͇,᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ16ᖺ᫓Ꮨ◊✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟,pp.93-96 㸦2004㸧

[33] ᶫᮏ⿱அ㸪ᑎ஭㈼୍㸪͆ ࢔ࢡࢸ࢕ࣈࣀ࢖ࢬࢥࣥࢺ࣮ࣟࣝࡢ࣮࢜ࢹ࢕࢜࡬ࡢᛂ⏝-᪂ ᖿ ⥺ࠕMaxࠖࡢ ࢩ ࣮ ࢺ ࢜ ࣮ ࢹ࢕࢜ ࢩ ࢫ ࢸ ࣒-͇᝟ ሗ ฎ ⌮,Vol.40㸪No.1,pp.14-17 㸦1999㸧

[34] S.Ise,H.Yano and H.Tachibana,͆Basic Study on Active Noise Barrier͇, J.acoust.Soc.Jpn(E),Vol.12㸪No.6㸪pp.299-306(1991)

[35] ᑿᮏ ❶, ⸨ཎ ᜤྖ㸪,͆ 㜵㡢ሟ࢚ࢵࢪ࣏ࢸࣥࢩࣕࣝࡢ⬟ືᾘཤ ͇,᪥ᮏ㡢㡪Ꮫ఍

ㄅ,Vol.47㸪No.11㸪pp. 801-808(1991)

[36] ๓⏣ᑗኴ㑻㸪すᮧṇ἞㸪ᒣཱྀ㐩ஓ㸪ⱱᮌᘓ஧͆ ከࢳࣕࣥࢿࣝἼᙧྠᮇἲࢆ⏝࠸

ࡓANCࡢᇶ♏◊✲ ͇᪥ᮏᶵᲔᏛ఍D&D2011,CD-ROM㸦2011㸧

[37] Ლᕝ჆ᘏ͆MR㦁㡢ࡢࡓࡵࡢ࢔ࢡࢸ࢕ࣈࣀ࢖ࢬࢥࣥࢺ࣮ࣟࣝࢩࢫࢸ࣒ࡢ᳨ウ ͇,

᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ22ᖺ᫓Ꮨ◊✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟,pp.5-8㸦2010㸧

[38] ᒣᕝ⯟ᖹ㸪Ლᕝ჆ᘏ͆MRᐊෆእ࡛ࡢ㡢ኌ఍ヰࢆ┠ⓗ࡜ࡋࡓ࣊ࢵࢻ࣐࢘ࣥࢺᆺANC ࢩࢫࢸ࣒ ͇,᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ25ᖺ᫓Ꮨ◊✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟,pp.117-120 㸦2013㸧

[39] M.Nishimura,K.Ohnishi,W.P.Patrick and A.C.Zander,͆Decelopment of Active Acoustic Treatment (Phase1,Basic concept and development of AAT-Cell)͇,Proc.of ACTIVE’97,pp.319-330(1997)

[40] W.P.Patrick㸪A.C.Zander㸪P.G.Mehta and M.Nishimura,K.Ohnishi,͆Decelopment of Active Acoustic Treatment (Phase2,Duct Test of AAT Sheet)͇,Proc.of ACTIVE’97,pp.331-344(1997)

[41] M.Nishimura,T.Goto and N.Kanamori,͆Basic Research of Active Sound Insulation Unit͇,Proc. of ICA 2004,III pp.2169-2172(2004)

[42] Y.Umebayashi㸪M.Nishimura㸪N.Kanamori and N.Furuyashiki,͆Basic Research of Active Sound Insulation Unit for Fllor Impact Noise͇,Proc. of INTERNOISE 2006,CD-ROM(2006)

[43] ᭷ᮏ΅㸪すᮧṇ἞㸪࿴⏣ಙᩗ,͆ ᖹ㠃ࢫࣆ࣮࢝ࢆ⏝࠸ࡓ࢔ࢡࢸ࢕ࣈ㐽㡢ࣘࢽࢵࢺ ࡢ㛤Ⓨ㸦᭱㐺ᵓ㐀ࡢ᳨ウ㸧͇,᪥ᮏᶵᲔᏛ఍D&D,CD-ROM(2010)

[44] K.Ohnishi, T.Saito, S.Teranishi,Y.Namikawa,T.Mori,K.Kimura and K.Uesaka͆ De-celopment of proto-type active soft edge noise barrier͇,Proc.of ICA 2004,II pp.1041-1044(2004)

[45] K.Ohnishi, S.Teranishi㸪M.Nishimura㸪K.Uesaka㸪K.Hachimine and H.Ohnishi͆ De-celopment of the Noise Barier Using Active Soft Edge, Part 1: Control Algorithm, Consistency with Active and Passive Performance and 2m Length Prototype Test in Anechoic Room͇,Proc. of ACTIVE99㸪pp.596-606(1999)

[46] ኱す៞୕㸪ᑎす㐍㸪すᮧṇ἞㸪ୖᆏඞᕭ㸪኱す༤ᩥ͆ ࢔ࢡࢸ࢕ࣈࢯࣇࢺ࢚ࢵࢪ㐽 㡢ቨࡢᇶᮏࢥࣥࢭࣉࢺ࡜↓㡪ᐊᐇ㦂࡟ࡼࡿῶ㡢ຠᯝ ͇,᪥ᮏ㡢㡪Ꮫ఍ㄅ,Vol.57㸪 No.2㸪pp.129-138(2001)

[47] ୖᆏඞᕭ㸪ᮌᮧ೺἞㸪୪ἙⰋ἞㸪኱す༤ᩥ㸪኱す៞୕㸪ᑎす㐍㸪すᮧṇ἞㸪͆ ࢔ ࢡࢸ࢕ࣈࢯࣇࢺ࢚ࢵࢪ㐽㡢ቨࡢ㛤Ⓨ࡜ῶ㡢ຠᯝࡢホ౯ ͇,᪥ᮏ㡢㡪Ꮫ఍ㄅ,Vol.58㸪 No.12㸪pp.753-760(2002)

[48] Ἑᓮ༤⛅㸪すᮧṇ἞㸪㔠᳃┤ᕼ㸪Ώ㎶ᩄᖾ͆ 㜵㡢ቨ⏝ANCࢩࢫࢸ࣒ࡢ㧗ᛶ⬟໬

࡟㛵ࡍࡿᇶ♏᳨ウ㸦➨2ሗ㸸↓㡪ᐊᐇ㦂 ͇,᪥ᮏᶵᲔᏛ఍➨18ᅇ⎔ቃᕤᏛ⥲ྜࢩ

࣏ࣥࢪ࣒࢘2008㸪CD-ROM(2008)

[49] S.M.Kuo,D.R.Morgan,͆Active Noise Control Systems algorithmes and DSP imple-mentations͇,Wiley-Interscience(1996)

[50] 㕥ᮌ᫛ḟ㸪すᮧṇ἞㸪㞡ᮏಙဢ㸪ᚚἲᕝᏛ͆ ᶵᲔ㡢㡪ᕤᏛ ͇,㸦ᰴ㸧ࢥࣟࢼ♫(2004) [51] 㐩 ྍ ⿱ ᕫ 㸪す ᮧ ṇ ἞ 㸪ⱱ ᮌ ೺ ஧ 㸪͆FPGAࢆ ⏝ ࠸ ࡓANC⏝ 㧗 ㏿ ಙ ྕ ฎ ⌮ ࣎ ࣮ ࢻࡢ㛤Ⓨ㸦ప࿘Ἴᇦ࡛ࡢῶ㡢ຠᯝࡢᨵၿ㸧͇᪥ᮏᶵᲔᏛ఍Dynamics and Design Conference2011(㧗▱㸧CD-ROMㄽᩥ㞟, No.627㸦2011㸧

[52] すᮧṇ἞㸪すᙳ◊୍㸪ᮧᑿ㐩ஓ㸪࿴⏣ಙᩗ͆ ᳨ฟ࣐࢖ࢡ࣭ࣟ࣍ࣥไᚚࢫࣆ࣮࢝

୍యᆺANCࣘࢽࢵࢺࡢ㛤Ⓨ ͇,᪥ᮏᶵᲔᏛ఍➨20ᅇ⎔ቃᕤᏛ⥲ྜࢩ࣏ࣥࢪ࣒࢘

2010㸪CD-ROM(2010)

㛵㐃ሗ࿌

➨ 1,2,3 ❶

(1) ᮧᑿ 㐩ஓ㸪すᮧ ṇ἞㸪࿴⏣ಙᩗ͆ ࢔ࢡࢸ࢕ࣈ㡢㡪ࢩ࣮ࣝࢹ࢕ࣥࢢ࡟㛵ࡍࡿᇶ♏

◊✲̭➨2ሗ̭ᑠ❆࡟タ⨨ࡋࡓሙྜࡢῶ㡢ᛶ⬟ ͇㸪᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ22 ᖺ᫓Ꮨ◊✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟㸪pp.13-16㸦2010㸧

(2) Masaharu Nishimura㸪Tatsuya Murao and Nobutaka Wada㸪Basic Study on Active Acoustic Shielding : Phase 2 Noise Reducing Performance for a Small Open Win-dow㸪Proc. of INTER NOISE 2010㸪CD-ROM㸦2010㸧

(3) Tatsuya Murao and Masaharu Nishimura㸪͆Basic Study on Active Acoustic Shielding

͇Journal of Environment and Engineering㸪Vol.7㸪No.1㸪pp㸬76-91㸦2012㸧

➨ 4 ❶

(4) Tatsuya Murao and Masaharu Nishimura㸪Basic Study on Active Acoustic Shielding:

phase 3 Improving Noise Reducing Performance in Low Frequency Region㸪Proc.

of INTER NOISE 2011㸪CD-ROM㸦2011㸧

(5) Tatsuya Murao㸪Masaharu Nishimura and Kazunori Sakurama㸪͆Basic Study on Active Acoustic Shielding: Phase 4 improving noise reducing performance in low frequency-2͇㸪Proc. of INTER NOISE 2012㸪CD-ROM㸦2012㸧

(6) Tatsuya Murao㸪Masaharu Nishimura㸪Kazunori SAKURAMA and Shin-ichiro Nishida

͆Basic study on active acoustic shielding (Improving noise-reducing performance in low-frequency range)͇Mechanical Engineering Journal㸪Vol.1㸪No.6㸪pp㸬EPS0065 㸦2014㸧

➨ 5 ❶

(7) ᮧᑿ 㐩ஓ㸪すᮧ ṇ἞㸪͆ ࢔ࢡࢸ࢕ࣈ㡢㡪ࢩ࣮ࣝࢹ࢕ࣥࢢ࡟㛵ࡍࡿᇶ♏◊✲̭➨3 ሗ̭ప࿘Ἴᖏᇦ࡟࠾ࡅࡿῶ㡢ᛶ⬟ᨵၿ ͇㸪᪥ᮏ㦁㡢ไᚚᕤᏛ఍ᖹᡂ25ᖺ᫓Ꮨ◊

✲Ⓨ⾲఍ㅮ₇ㄽᩥ㞟㸪pp.101-104㸦2013㸧̭̭

(8) Tatsuya Murao㸪Masaharu Nishimura and Kazunori Sakurama͆Basic study on active acoustic shielding: phase 5 improving the method to enlarge AAS window͇Proc.

of INTER NOISE 2013㸪CD-ROM㸦2013㸧̭

(9) Tatsuya Murao㸪Masaharu Nishimura㸪Kazunori SAKURAMA and Shin-ichiro Nishida

͆Basic study on active acoustic shielding: phase 6 improving the method to enlarge AAS window-2͇Proc. of INTER NOISE 2014㸪USB flash memory㸦2014㸧

௜ 㘓 A

ᇶ♏ไᚚᡭἲ

ᮏ❶࡛ࡣ㸪㐺ᛂࣇ࢕ࣝࢱࡢཎ⌮࡜࢔ࣝࢦࣜࢬ࣒࡟ࡘ࠸࡚⤂௓ࡋ㸪୍ḟඖࢲࢡࢺ࡟

࠾ࡅࡿANCไᚚࢩࢫࢸ࣒ࢆ౛࡟ᣲࡆ㸪ᇶ♏ไᚚᡭἲ࡟ࡘ࠸࡚㏙࡭ࡿ㸬

A.1 㐺ᛂࣇ࢕ࣝࢱࡢཎ⌮

̭ᮏ❶࡛ࡣ㸪㐺ᛂࣇ࢕ࣝࢱ࡜ࡋ࡚ከࡃ⏝࠸ࡽࢀ࡚࠸ࡿ᭷㝈࢖ࣥࣃࣝࢫᛂ⟅㸦Finite Impulse Response㸸FIR㸧ᆺ㐺ᛂࢹ࢕ࢪࢱࣝࣇ࢕ࣝࢱࢆ⪃࠼ࡿ㸬ᮏ᮶㸪NhḟࡢFIRࣇ࢕

ࣝࢱࡢሙྜ㸪Nhḟ㐃❧᪉⛬ᘧࡢゎ࡜ࡋ࡚ࣇ࢕ࣝࢱಀᩘࡀᑟࡁฟࡉࢀࡿ㸬ࡇࡢ᪉⛬ᘧ

ࢆFIRࣇ࢕ࣝࢱࡢṇつ᪉⛬ᘧ࡜࿧ࡧ[15]㸪┤᥋ゎࡃᡭἲ࡛ࡣ㸪ࣇ࢕ࣝࢱࡢḟᩘࡀከࡃ

࡞ࡿ࡜₇⟬㔞ࡀቑ኱ࡍࡿ㸬ࡇࡢၥ㢟ࢆゎỴࡍࡿࡓࡵ࡟㏲ḟⓗ࡟᭱㐺ゎࢆồࡵࡿ᪉ἲ ࡀᥦ᱌ࡉ࡟ࢀ࡚࠾ࡾ㸪ࡑࡢ୍ࡘ࡟᭱ᛴ㝆ୗἲࡀ࠶ࡿ㸬᭱ᛴ㝆ୗἲࡣ㸪࠶ࡿࣇ࢕ࣝࢱ ಀᩘ࡟ᑐࡋ࡚஧஌ᖹᆒㄗᕪࡢ୍ḟᑟ㛵ᩘ࠿ࡽ໙㓄ࢆồࡵ㸪ࡑࡢ໙㓄ࡀ㈇ࡢ᪉ྥ࡟ಀ

ᩘࢆ᭦᪂ࡍࡿࡇ࡜࡛㸪᭱ᑠ஧஌ᖹᆒ࡟฿㐩ࡍࡿࡇ࡜ࢆ฼⏝ࡋ࡚࠸ࡿ㸬ࡋ࠿ࡋ㸪໙㓄

࣋ࢡࢺࣝࢆồࡵࡿ㝿࡟஧஌ㄗᕪࡢᮇᚅ್ࡀᚲせ࡜࡞ࡾ㸪₇⟬㔞ࡣᑡ࡞ࡃࡣ࡞࠸㸬ࡑ ࡇ࡛㸪௦ࢃࡾ࡟஧ᆒㄗᕪࡢ▐᫬್ࢆ⏝࠸ࡓ࢔ࣝࢦࣜࢬ࣒ࡀLMS࢔ࣝࢦࣜࢬ࣒࡛࠶

ࡿ㸬Fig.A.1(a)ࡣ࠶ࡿ┠ᶆಙྕd(n)ࢆ㐺ᛂࣇ࢕ࣝࢱࡢฟຊಙྕy(n)࡛᥎ᐃࡍࡿ౛ࢆ

♧ࡍ㸬㐺ᛂࣇ࢕ࣝࢱࡢᙺ๭ࡣ㸪ࡑࡢఏ㐩≉ᛶࡍ࡞ࢃࡕࣇ࢕ࣝࢱಀᩘࢆኚ࠼࡞ࡀࡽy(n)

ࢆd(n)࡟㏆࡙ࡅࡿࡇ࡜࡛࠶ࡿ㸬ࡍ࡞ࢃࡕ㸪Fig.A.1(b)ࡢ᥎ᐃㄗᕪಙྕe(n)ࡣ

e(n) =d(n)−y(n) (A.1)

ࢆ᭱ᑠ࡟ࡍࡿࡇ࡜ࡀ㐺ᛂࣇ࢕ࣝࢱࡢᙺ๭࡜࠸࠼ࡿ㸬࠸ࡲ㐺ᛂࣇ࢕ࣝࢱ࡜ࡋ࡚㸪Fig.A.2 ࡢhkࢆಀᩘࢆࡍࡿFIRࣇ࢕ࣝࢱࢆ⏝࠸ࡿ࡜ࡍࡿ࡜ࡑࡢฟຊಙྕy(n)ࡣ㸪ࡓࡓࡳ㎸ࡳ

࿴࡛⾲ࡉࢀ㸪

y(n) =

N−1

k=0

hkx(n−k) (A.2)

࡜࡞ࡿ㸬̭Eq.(A.2)ࡼࡾ㸪ྠࡌධຊಙྕx(n) ࡛ࡶಀᩘ ࢆኚ࠼ࡿࡇ࡜࡟ࡼࡾ㸪ࣇ࢕

ࣝࢱฟຊy(n)ࡀኚ໬ࡍࡿࡇ࡜ࡀศ࠿ࡿ㸬̭࡜ࡇࢁ࡛ㄗᕪホ౯㔞ࡀ㸪Eq.(A.1)ࡢㄗᕪ ಙྕe(n)ࡢࡲࡲ࡛࠶ࡿ࡜㸪e(n) = 0࡜࡞ࡿࣇ࢕ࣝࢱಀᩘhkࡢ⤌ࡳྜࢃࡏࡣᩘከࡃᏑ ᅾࡍࡿ㸬ࡑࡇ࡛㸪e(n)ࡢ⮬஌್e²(n)ࢆ᥎ᐃㄗᕪࡢホ౯㔞࡜ࡋ࡚ࡳࡿ㸬

Fig. A.1 : Presumption of the Signal Using Adaptive Filter

Fig. A.2 : FIR Adaptive Filter

e²(n) ={d(n)−y(n)}² =d²(n)−2d(n)y(n) +y²(n) (A.3) Eq.(A.3)࡟Eq.(A.2)ࡢy(n)ࢆ௦ධࡍࡿ࡜

e²(n) =d²(n)−2d(n)

_N−1

k=0

h_kx(n−k)

+

N−1

k=0 N−1

m=0

h_kx(n−k)h_mx(n−m) (A.4)

࡜ ࡞ ࡿ 㸬౛ ࠼ ࡤ 㸪N=2࡜ ࡋ 㸪ࣇ࢕ࣝ ࢱ ಀ ᩘ ࡀh0㸪h1 ࡢ ஧ ࡘ ࡛ ࠶ ࡿ ࡜ ࡍ ࡿ ࡜ 㸪Eq㸬 (A.4)ࡣ

e²(n) = d²(n)−2d(n){h0x(n) +h1x(n−1)}

+x²(n)h²₀+x²(n−1)h²₁+ 2h0h1x(n)x(n−1) (A.5)

࡜࡞ࡾ㸪ࣇ࢕ࣝࢱಀᩘh₀㸪h₁ࢆኚᩘ࡜ࡍࡿ஧ḟ㛵ᩘ࡜࡞ࡗ࡚࠸ࡿ㸬ㄗᕪホ౯㔞e²(n) ࡀ஧ḟ㛵ᩘ࡛࠶ࡿ࡜࠸࠺ࡇ࡜ࡣ㸪Fig.A.3࡟♧ࡍࡼ࠺࡟ୗ࡟ฝ࡞ࡍࡾࡤࡕ≧ࡢ஧ḟ᭤

㠃࡜⪃࠼ࡽࢀ㸪ㄗᕪࡢ᭱ᑠⅬe²_min(n)ࡀ၏୍Ꮡᅾࡍࡿ࡜࠸࠺ࡇ࡜࡛࠶ࡿ㸬e²_min(n) ࡟

࠾ࡅࡿಀᩘh^opt₀ 㸪h^opt₁ ࡀ㸪᫬้n࡟࠾ࡅࡿ᭱㐺࡞ࣇ࢕ࣝࢱಀᩘ࡜࡞ࡿ㸬

࡜ࡇࢁ࡛㸪Eq.(A.3)࡛ࡣ᭱㐺ಀᩘ್ࡀ᫬㛫ⓗ࡟ኚ໬ࡋ࡚ࡋࡲ࠺ࡢ࡛Eq.(A.3)࡟௦

ࢃࡿูࡢㄗᕪホ౯㔞࡜ࡋ࡚㸪஧஌ᖹᆒㄗᕪE[e²(n)]ࢆ⏝࠸ࡿ[15]㸬

Ee²(n)=

n k=0

e² =

n k=0

{d(k)−y(k)}² (A.6)

Fig. A.3 : The Amount of Evaluations of Square Error

ドキュメント内 Basic Study on Active Acoustic Shielding (ページ 119-138)