<font size=4.97em><b>홈레코딩 위키</b></font>
by <a href="https://riversidejazz.imweb.me" target="_blank">리버사이드 재즈 레이블</a>
https://wiki.homerecz.com/
2026-04-30T07:41:31+00:00
<font size=4.97em><b>홈레코딩 위키</b></font>
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2026-03-22T17:48:37+00:00
Anonymous (anonymous@undisclosed.example.com)
어커스틱 임피던스
https://wiki.homerecz.com/doku.php/acoustics/physical_acoustics/acoustic_impedance
<h1 class="sectionedit1" id="어커스틱_임피던스">어커스틱 임피던스</h1>
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<a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=어커스틱" class="wikilink1" target="_blank" title="start" data-wiki-id="start">어커스틱</a> <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a>는 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound/start" class="wikilink1" target="_blank" title="acoustics:sound:start" data-wiki-id="acoustics:sound:start">음파</a>가 매질을 통해 전파될 때 <a href="https://wiki.homerecz.com/doku.php/%EC%9D%8C%ED%96%A5/electric_circuit/formula_wheel" class="wikilink1" target="_blank" title="음향:electric_circuit:formula_wheel" data-wiki-id="음향:electric_circuit:formula_wheel">저항</a>하는 정도를 나타내는 물리량으로, <a href="https://wiki.homerecz.com/doku.php/%EC%9D%8C%ED%96%A5/decibel/dbspl" class="wikilink1" target="_blank" title="음향:decibel:dbspl" data-wiki-id="음향:decibel:dbspl">음압</a>과 입자 운동의 비율로 정의됩니다. 이는 전기적 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a>처럼 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=시그널 신호" class="wikilink1" target="_blank" title="start" data-wiki-id="start">신호</a> 효율을 다루는 게 아니라, <a href="https://wiki.homerecz.com/doku.php/acoustics/sound/start" class="wikilink1" target="_blank" title="acoustics:sound:start" data-wiki-id="acoustics:sound:start">음파</a>의 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a>·투과·<a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/diffraction" class="wikilink1" target="_blank" title="acoustics:sound_behavior:diffraction" data-wiki-id="acoustics:sound_behavior:diffraction">회절</a>을 예측하는 데 핵심적입니다.
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<h2 class="sectionedit2" id="기본_정의와_수식">기본 정의와 수식</h2>
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두 가지 주요 형태로 구분됩니다:
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<ul>
<li class="level1"><div class="li"> <strong><a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=음향 음향학" class="wikilink1" target="_blank" title="start" data-wiki-id="start">음향</a> <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> (Z)</strong>: <strong><em>Z = p/u</em></strong> 또는 <strong><em>Z = p/U</em></strong> (p: <a href="https://wiki.homerecz.com/doku.php/%EC%9D%8C%ED%96%A5/decibel/dbspl" class="wikilink1" target="_blank" title="음향:decibel:dbspl" data-wiki-id="음향:decibel:dbspl">음압</a>, u: 입자속도, U: 체적속도). 단위는 Rayl (Pa·s/m) 또는 acoustical ohm</div>
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<li class="level1"><div class="li"> <strong>특성 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=음향 음향학" class="wikilink1" target="_blank" title="start" data-wiki-id="start">음향</a> <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> (z₀)</strong>: 평면파에서 <strong><em>z_0 = ρ × c</em></strong> (ρ: 밀도, c: 음속). 공기 ≈ 415 Rayl, 물 ≈ 1.5 MRayl</div>
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<h2 class="sectionedit3" id="반사계수_계산법">반사계수 계산법</h2>
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두 매질 경계에서의 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a> 강도는 다음으로 결정됩니다:
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<strong><em>R = (z_2 - z_1)/(z_2 + z_1)</em></strong>
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<a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> 차이가 클수록 |R| 값이 1에 가까워 완전 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a>됩니다.
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<th class="col0"> 매질 조합 </th><th class="col1"> z₁/z₂ 비율 </th><th class="col2"> <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a>계수(R) </th><th class="col3"> 실제 예시 </th>
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<td class="col0"> 공기-공기 </td><td class="col1"> 1:1 </td><td class="col2"> 0 </td><td class="col3"> 자유 전파 </td>
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<td class="col0"> 공기-콘크리트 </td><td class="col1"> 1:3000 </td><td class="col2"> ≈0.995 </td><td class="col3"> <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=스튜디오 녹음실" class="wikilink1" target="_blank" title="start" data-wiki-id="start">스튜디오</a> 벽 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a> </td>
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<td class="col0"> 공기-헬륨 </td><td class="col1"> 1:0.4 </td><td class="col2"> -0.43 </td><td class="col3"> 부분 투과 </td>
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<h2 class="sectionedit5" id="오디오음향공학_적용">오디오/음향공학 적용</h2>
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<li class="level1"><div class="li"> <strong><a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=스피커" class="wikilink1" target="_blank" title="start" data-wiki-id="start">스피커</a> 효율</strong>: 진동판과 공기 간 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> mismatch로 에너지 손실 발생. 호른 구조로 매칭 개선</div>
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<li class="level1"><div class="li"> <strong><a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=룸" class="wikilink1" target="_blank" title="start" data-wiki-id="start">룸 </a>어쿠스틱</strong>: 흡음재는 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> 매칭으로 <a href="https://wiki.homerecz.com/doku.php/acoustics/sound_behavior/reflection" class="wikilink1" target="_blank" title="acoustics:sound_behavior:reflection" data-wiki-id="acoustics:sound_behavior:reflection">반사</a> 줄임 (공기 ≈ 흡음재)</div>
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<li class="level1"><div class="li"> <strong><a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=마이크로폰 마이크" class="wikilink1" target="_blank" title="start" data-wiki-id="start">마이크</a> 설계</strong>: <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=캡슐" class="wikilink1" target="_blank" title="start" data-wiki-id="start">캡슐</a>과 공기 간 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=임피던스" class="wikilink1" target="_blank" title="start" data-wiki-id="start">임피던스</a> 변화로 <a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=감도" class="wikilink1" target="_blank" title="start" data-wiki-id="start">감도</a>·<a href="https://wiki.homerecz.com/doku.php/start?do=showtag&tag=지향 지향각 지향성" class="wikilink1" target="_blank" title="start" data-wiki-id="start">지향성</a> 조절</div>
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<div class="tags"><span>
<a href="https://wiki.homerecz.com/doku.php/tag/%EC%96%B4%EC%BB%A4%EC%8A%A4%ED%8B%B1?do=showtag&tag=%EC%96%B4%EC%BB%A4%EC%8A%A4%ED%8B%B1" class="wikilink1" title="tag:어커스틱" rel="tag">어커스틱</a>,
<a href="https://wiki.homerecz.com/doku.php/tag/%EC%9E%84%ED%94%BC%EB%8D%98%EC%8A%A4?do=showtag&tag=%EC%9E%84%ED%94%BC%EB%8D%98%EC%8A%A4" class="wikilink1" title="tag:임피던스" rel="tag">임피던스</a>
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