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我们å¯å°†å·¥ä½œé¢‘率在音频以上的å˜åŽ‹å™¨ç»Ÿç§°ä¸ºé«˜é¢‘å˜åŽ‹å™?/h3>
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<p><font face="宋体"><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">一å°ç†æƒ³çš„高频å˜åŽ‹å™¨æ˜¯ç›¸å¯¹äºŽéŸ³é¢‘与工频å˜åŽ‹å™¨è€Œè¨€çš„ã€‚ä½†å› ä¸ºé«˜é¢‘çš„èŒƒå›´å¤ªå¹¿ï¼Œæ‰€ä»¥è¦æ˜Žç¡®çš„划分是困难的。就æ¤ï¼Œæˆ‘们å¯å°†å·¥ä½œé¢‘率在音频以上的å˜åŽ‹å™¨ç»Ÿç§°ä¸ºé«˜é¢‘å˜åŽ‹å™¨ã€‚但其实这ç§å«æ³•æ˜¯ä¸ä¸¥æ ¼çš„ã€‚æ‰€ä»¥ï¼Œæ ¹æ®å…¶å·¥ä½œé¢‘率，我们将高频å˜åŽ‹å™¨åˆ†ä¸ºä»¥ä¸‹å‡ ç±»ï¼?/span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><o:p></o:p></span></font></p>
<p><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">一ã€æŒ‰å·¥ä½œé¢‘带分为</font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><br />
1.</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">å•é¢‘或窄频级高频å˜åŽ‹å™¨ï¼Œå®ƒæ˜¯æŒ‡å·¥ä½œé¢‘率为å•é¢‘或是一个很窄的频段，如å˜æ¢å™¨å˜åŽ‹å™¨ã€æŒ¯è¡å™¨å˜åŽ‹å™¨ç‰ï¼?/font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><br />
2.</span><font face="宋体"><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">宽频带å˜åŽ‹å™¨ï¼Œå®ƒæ˜¯æŒ‡å·¥ä½œåœ¨ä¸€ä¸ªå¾ˆå®½é¢‘率范围内的å˜åŽ‹å™¨ï¼Œå¦‚阻抗å˜æ¢å™¨å˜åŽ‹å™¨ã€é€šè®¯å˜åŽ‹å™¨ã€å®½å¸¦åŠŸçŽ‡æ”¾å¤§å™¨å˜åŽ‹å™¨ç‰ã€?/span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><o:p></o:p></span></font></p>
<p><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">二ã€æŒ‰é¢‘率范围分为</font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><br />
1.kHz</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">级高频å˜åŽ‹å™¨ï¼Œå®ƒæ˜¯æŒ‡å·¥ä½œé¢‘率åœ?/font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US">20kHz</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">è‡³å‡ ç™?/font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US">kHz</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">的高频å˜åŽ‹å™¨ï¼?/font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><br />
2.MHz</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">级高频å˜åŽ‹å™¨ï¼Œè§æ¥è¯´å°±æ˜¯æŒ‡ä¸€å°å·¥ä½œé¢‘率在</font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US">1MHz</span><span style="font-size: 9pt; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma"><font face="宋体">以上的高频å˜åŽ‹å™¨ã€?/font></span><span style="font-family: Tahoma; font-size: 9pt" lang="EN-US"><o:p></o:p></span></p>
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