<p class="MsoNormal"><span lang="ko">안녕하세요</span>.</p> <p></p> <p class="MsoNormal"><span lang="ko">하루종일</span><span lang="ko"> </span><span lang="ko">컴퓨터와</span><span lang="ko"> </span><span lang="ko">지내는</span><span lang="ko"> </span><span lang="ko">컴덕후</span><span lang="ko"> </span><span lang="ko">입니다</span>.<br></p> <p><span lang="ko" style="font-size:9pt;">컴퓨터와</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">할</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것에</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">관심이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">많아지다</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">보니</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">자연스럽게</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">피시파이까지</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">왔고</span><span style="font-size:9pt;">, </span><span lang="ko" style="font-size:9pt;">뭐가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">좋은지</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">정도는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">알아야</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">되지</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">않겠나</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">싶어서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">디지털</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음악도</span><span lang="ko" style="font-size:9pt;"> 이것저것 </span><span lang="ko" style="font-size:9pt;">공부하면서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">배운</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것들을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">공유하고</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">싶어서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">써</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">봅니다</span><span style="font-size:9pt;">. 음덕 게시판이 더 활성화 되자는 마음과 음악 원리를 더 쉽게 이해하여 좋은 제품을 구하시라는 생각에 써 봤습니다. ㅎㅎ</span></p> <p></p> <p class="MsoNormal"></p> <p></p> <p class="MsoNormal"><span lang="ko" style="font-size:9pt;"></span></p> <div style="text-align:left;"> <div style="text-align:left;"><img src="http://thimg.todayhumor.co.kr/upfile/201609/1474684427157e8c0037ef4db2a550780972e549da__mn572068__w548__h704__f57550__Ym201609.jpg" width="548" height="704" alt="h1.jpg" style="border:none;" filesize="57550"></div></div> <div style="text-align:left;"><span style="font-size:9pt;">이녀석은 헤드폰의 형님급인 HD800입니다. 성능지표에 대해서는 나중에 하나씩 설명할건데 이번에는 frequency response 주파수 응답과 6-51,000Hz가 먼소리인지에 대해 알아 보겠습니다.</span></div> <p></p> <p class="MsoNormal"><span lang="ko" style="font-size:9pt;">스피커</span><span style="font-size:9pt;">, </span><span lang="ko" style="font-size:9pt;">헤드폰</span><span style="font-size:9pt;">, </span><span lang="ko" style="font-size:9pt;">이어폰등의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">성능</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">지표중</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">하나가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">주파수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">범위입니다. </span><span lang="ko" style="font-size:9pt;">이것은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">출력장치가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">표현할</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">소리</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">영역을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">나타내는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것으로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">낮은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">숫자는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">최저음</span><span style="font-size:9pt;">, </span><span lang="ko" style="font-size:9pt;">높은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">숫자는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">최고음을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">나타냅니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">물론</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">저음은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">낮을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수록</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">고음은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">높을수록</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">좋은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">제품입니다</span><span style="font-size:9pt;">. 그런데 </span><span lang="ko" style="font-size:9pt;">스피커</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">회사중</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">보스제품만</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">주파수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">범위를</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">공개하지</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">않습니다! 뭐 여튼</span><span style="font-size:9pt;"> 다른 </span><span lang="ko" style="font-size:9pt;">한편으로는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">사람이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">들을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">소리영역이</span><span style="font-size:9pt;"> 20Hz – 20kHz</span><span lang="ko" style="font-size:9pt;">이기</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">때문에</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">그</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">이상은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">필요</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">없다는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">의견도</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있습니다</span><span style="font-size:9pt;">. 근데 위 헤드폰으로 음악을 들으면 신기하게 다른 헤드폰에선 안 들렸던 소리가..</span></p> <p class="MsoNormal"><span style="font-size:9pt;"><br></span></p> <p class="MsoNormal"><span lang="ko"></span></p> <div style="text-align:left;"><img src="http://thimg.todayhumor.co.kr/upfile/201609/1474684112edae55363eca4d7eb092ca9c73393b71__mn572068__w778__h450__f47735__Ym201609.jpg" width="778" height="450" alt="h2.jpg" style="border:none;" filesize="47735"></div> <p></p> <p class="MsoNormal"><span lang="ko">소리는</span><span lang="ko"> </span><span lang="ko">공기의</span><span lang="ko"> </span><span lang="ko">진동</span>(<span lang="ko">울림</span>)<span lang="ko">이고</span><span lang="ko"> </span><span lang="ko">그</span><span lang="ko"> </span><span lang="ko">모양은</span><span lang="ko"> 중/고딩</span><span lang="ko">때</span><span lang="ko"> </span><span lang="ko">잠깐</span><span lang="ko"> </span><span lang="ko">봤던</span><span lang="ko"> 위의 </span><span lang="ko">사인-</span><span lang="ko">코사인</span><span lang="ko"> </span><span lang="ko">그래프처럼</span><span lang="ko"> </span><span lang="ko">나옵니다</span>. <span lang="ko" style="font-size:9pt;">여기서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">한번</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">위아래로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">움직이는걸</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">파동이라고</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">합니다</span><span style="font-size:9pt;">.</span><span style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">헤르츠</span><span style="font-size:9pt;">(Hz)</span><span lang="ko" style="font-size:9pt;">는</span><span style="font-size:9pt;"> </span><span style="font-size:9pt;">1</span><span lang="ko" style="font-size:9pt;">초에</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">울림</span><span style="font-size:9pt;">(</span><span lang="ko" style="font-size:9pt;">파동</span><span style="font-size:9pt;">)</span><span lang="ko" style="font-size:9pt;">이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">몇번이냐</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있는가를</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">나타내는</span><span lang="ko" style="font-size:9pt;"> 단위</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">입니다</span><span style="font-size:9pt;">.</span><span style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">벌건</span><span lang="ko" style="font-size:9pt;"> 그래프가</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">1</span><span lang="ko" style="font-size:9pt;">초에</span><span style="font-size:9pt;"> </span><span style="font-size:9pt;">100</span><span lang="ko" style="font-size:9pt;">번</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">움직인다 가정하면 </span><span style="font-size:9pt;">100</span><span lang="ko" style="font-size:9pt;">헤르츠이고 </span><span lang="ko" style="font-size:9pt;">보라돌이는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">두배로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">빨리</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">움직이니까</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">200</span><span lang="ko" style="font-size:9pt;">헤르츠로 볼 수 있습네다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">나중에</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">또</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">소개하겠지만</span><span lang="ko" style="font-size:9pt;"> 이 </span><span lang="ko" style="font-size:9pt;">물결</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">그래프가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">일반</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">자연의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">소리 파장인</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">아날로그</span><span style="font-size:9pt;">(</span><span lang="ko" style="font-size:9pt;">자연적인</span><span style="font-size:9pt;">)</span><span style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">입니다</span><span style="font-size:9pt;">.</span><span style="font-size:9pt;">이걸 디지털 음악으로 표현 한다는 것은 아래처럼 표현한다는 겁니다.</span></p> <p class="MsoNormal"></p> <p></p> <p class="MsoNormal"></p> <div style="text-align:left;"><img src="http://thimg.todayhumor.co.kr/upfile/201609/14746845054aca61d8fa8b4257bdeb40f94e23f387__mn572068__w697__h229__f11969__Ym201609.jpg" width="697" height="229" alt="h5.jpg" style="border:none;" filesize="11969"></div>물론 요새 기술은 이것보다 훨씬 촘촘하게 나눠서 기록하기 때문에 원음 손실은 거의 없다고 보시면 됩니다. <p></p> <p class="MsoNormal"><br></p> <p class="MsoNormal"><span lang="ko"></span></p> <div style="text-align:left;"><img src="http://thimg.todayhumor.co.kr/upfile/201609/1474683994756703394acd4273ab7896034f6804b8__mn572068__w610__h331__f20687__Ym201609.jpg" width="610" height="331" alt="h4.jpg" style="border:none;" filesize="20687"></div> <p></p> <p class="MsoNormal"><span lang="ko">목소리가 플레이어의 이팩트 중에 위와 같은</span><span lang="ko"> </span><span lang="ko">웨이브가</span><span lang="ko"> </span><span lang="ko">이리저리</span><span lang="ko"> </span><span lang="ko">흔들리는게</span><span lang="ko"> </span><span lang="ko">있는데</span><span lang="ko"> </span><span lang="ko">그게</span><span lang="ko"> 각 음의</span><span lang="ko"> </span><span lang="ko">조합</span><span lang="ko"> </span><span lang="ko">입니다</span>. 위 아래는 소리의 크기(전류 세기)를 나타내고 가로는 소리 파장을 나타내는 시간 입니다. 물론 1초에 몇천번씩 다르게 움직이니까 우리는 저렇게 보입니다. 또한 인<span lang="ko">간이</span><span lang="ko"> </span><span lang="ko">들을</span><span lang="ko"> </span><span lang="ko">수</span><span lang="ko"> </span><span lang="ko">있는</span> 20Hz – 20kHz<span lang="ko">는</span><span lang="ko"> </span><span lang="ko">소리의</span><span lang="ko"> </span><span lang="ko">파장</span>(<span lang="ko">음파</span>)<span lang="ko">이</span> 1<span lang="ko">초에</span> 20<span lang="ko">번에서</span> 2<span lang="ko">만번까지</span><span lang="ko"> </span><span lang="ko">흔들리는</span><span lang="ko"> </span><span lang="ko">것을</span><span lang="ko"> </span><span lang="ko">들을</span><span lang="ko"> </span><span lang="ko">수</span><span lang="ko"> </span><span lang="ko">있다는</span><span lang="ko"> </span><span lang="ko">소리</span><span lang="ko"> </span><span lang="ko">입니다</span>.</p> <p></p> <div><br></div><br><p class="MsoNormal"><span lang="ko">이제 헤르츠(Hz)는 1초에 소리가 얼마나 많이 움직이냐를 나타내는 단위인걸 알았습니다. 그럼</span><span lang="ko"> </span><span lang="ko">도레미파솔</span>.. <span lang="ko">각</span><span lang="ko"> </span><span lang="ko">음을</span><span lang="ko"> </span><span lang="ko">표현하는</span><span lang="ko"> </span><span lang="ko">공기</span><span lang="ko"> </span><span lang="ko">진동을</span><span lang="ko"> </span><span lang="ko">어떻게</span><span lang="ko"> </span><span lang="ko">숫자로</span><span lang="ko"> </span><span lang="ko">표현하고</span><span lang="ko"> </span><span lang="ko">헤르츠라는</span><span lang="ko"> </span><span lang="ko">단위를</span><span lang="ko"> </span><span lang="ko">썼는지</span><span lang="ko"> </span><span lang="ko">궁금하지</span><span lang="ko"> </span><span lang="ko">않으십니까</span>? 궁금하지 않으시다구요? 근데 전 궁금해서 더 알아 봤습니다.</p> <p></p> <p class="MsoNormal"><span lang="ko" style="font-size:9pt;">옛날</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">독일</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">과학자들은</span><span style="font-size:9pt;"> 1600</span><span lang="ko" style="font-size:9pt;">년쯤</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">공기펌프를</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">이용하여</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">소리가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">울림이라는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">알아냈고</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">각</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">마다</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">고유의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">울림</span><span style="font-size:9pt;">(</span><span lang="ko" style="font-size:9pt;">주파수</span><span style="font-size:9pt;">)</span><span lang="ko" style="font-size:9pt;">가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있다는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">알아</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">냈습니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">그리고</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">1834</span><span lang="ko" style="font-size:9pt;">년</span><span style="font-size:9pt;">, </span><span lang="ko" style="font-size:9pt;">각종</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음덕후들은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">독일에서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">회의를</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">열어서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">기준이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">되는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">표준음</span><span style="font-size:9pt;">440Hz</span><span lang="ko" style="font-size:9pt;">를</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">결정</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">합니다</span><span style="font-size:9pt;">. 440Hz</span><span lang="ko" style="font-size:9pt;">는</span><span lang="ko" style="font-size:9pt;"> 1초에 소리가 440번 움직이는 것으로 </span><span lang="ko" style="font-size:9pt;">피아노</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">가운데</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">도에서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">오른쪽으로</span><span style="font-size:9pt;"> 5</span><span lang="ko" style="font-size:9pt;">칸</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">움직인</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">라</span><span style="font-size:9pt;">’이고</span><span lang="ko" style="font-size:9pt;"> 이 음을 </span><span style="font-size:9pt;">‘A’</span><span lang="ko" style="font-size:9pt;">로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">정하였습니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">그래서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">도는</span><span style="font-size:9pt;"> C</span><span lang="ko" style="font-size:9pt;">가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">되는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">것이고</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">솔은</span><span style="font-size:9pt;"> G</span><span lang="ko" style="font-size:9pt;">코드가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">되는거죠</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">그리고</span><span style="font-size:9pt;"> 1</span><span lang="ko" style="font-size:9pt;">옥타브</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">높아지는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">다음</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">라</span><span style="font-size:9pt;">’</span><span lang="ko" style="font-size:9pt;">는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">기존</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">숫자의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">두배인</span><span style="font-size:9pt;"> 880Hz</span><span lang="ko" style="font-size:9pt;">로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">하기로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">했습니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">반대로</span><span style="font-size:9pt;"> 1</span><span lang="ko" style="font-size:9pt;">옥타브</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">낮아지는</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">라</span><span style="font-size:9pt;">’</span><span lang="ko" style="font-size:9pt;">는</span><span style="font-size:9pt;"> 220Hz</span><span lang="ko" style="font-size:9pt;">입니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">쉽게</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">정리하자면</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">아래와</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">같습니다</span><span style="font-size:9pt;">.</span></p> <p class="MsoNormal"></p> <p></p> <div style="text-align:left;"> <div style="text-align:left;"><img src="http://thimg.todayhumor.co.kr/upfile/201609/14746851670c855453a6c04791b8d4cacf88d02b6f__mn572068__w798__h264__f64579__Ym201609.jpg" width="798" height="264" alt="h3.jpg" style="border:none;" filesize="64579"></div></div> <p class="MsoNormal"><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">라</span><span style="font-size:9pt;">’ </span><span lang="ko" style="font-size:9pt;">사이의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">구간</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">범위를</span><span style="font-size:9pt;"> 1/7</span><span lang="ko" style="font-size:9pt;">로</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">나눠서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">정합니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">여기서</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">보면</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">낮은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">범위는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">점점</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">줄어</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">들지만</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">높은</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">음의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">범위는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">점점</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">높아지는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">걸</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">알</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있습니다</span><span style="font-size:9pt;">. 3520Hz</span><span lang="ko" style="font-size:9pt;">의</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">다음</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">라</span><span style="font-size:9pt;">’</span><span lang="ko" style="font-size:9pt;">는</span><span style="font-size:9pt;">7040Hz, </span><span lang="ko" style="font-size:9pt;">다음은</span><span style="font-size:9pt;">14,080Hz… 1</span><span lang="ko" style="font-size:9pt;">옥타브</span><span lang="ko" style="font-size:9pt;"> </span><span style="font-size:9pt;">‘</span><span lang="ko" style="font-size:9pt;">도</span><span style="font-size:9pt;">’</span><span lang="ko" style="font-size:9pt;">가</span><span style="font-size:9pt;"> 261.626Hz</span><span lang="ko" style="font-size:9pt;">니가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">사람이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">들을</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">있는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">고음인</span><span style="font-size:9pt;">20kHz</span><span lang="ko" style="font-size:9pt;">는</span><span style="font-size:9pt;">6-7</span><span lang="ko" style="font-size:9pt;">옥타브</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">입니다</span><span style="font-size:9pt;">. </span><span lang="ko" style="font-size:9pt;">그</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">위는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">돌고래끼리</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">대화하는</span><span lang="ko" style="font-size:9pt;"> 영역이고</span><span style="font-size:9pt;">.. </span><span lang="ko" style="font-size:9pt;">더</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">위는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">라디오들이</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">주고</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">받는</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">주파수</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">입니다</span><span style="font-size:9pt;">.<br></span><span style="font-size:9pt;">마지막으로 </span><span lang="ko" style="font-size:9pt;">높은</span><span lang="ko" style="font-size:9pt;"> 옥타브로 </span><span lang="ko" style="font-size:9pt;">갈</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">수록</span><span lang="ko" style="font-size:9pt;"> 주파수 </span><span lang="ko" style="font-size:9pt;">범위가</span><span lang="ko" style="font-size:9pt;"> </span><span lang="ko" style="font-size:9pt;">커지게 되는 것을 알게 됩니다. 이것은 각 음과의 주파수 차이 범위가 커진다는 소리 입니다. 이러다보면 전기신호에 '노이즈'가 섞이기 때문에 저가형 스피커이 높은 출력으로 고음을 표현하기가 힘들고 소리가 찢어지는 원인 입니다.</span></p> <p class="MsoNormal">소리와 주파수가 무엇인지 알아 봤는데 헤드폰을 들으면 괜히 더 섬세하게 들리는 기분이 들지 않으십니까? 호응이 좋으면 임피던스나 데시벨등도 다뤄 보겠습니당</p> <p class="MsoNormal"></p> <p></p> <p class="MsoNormal"></p> <p> </p>