美国SHURE/舒尔 BETA87A 有线手持话筒 人声话筒 专业录音话筒 电容乐器录音话筒 舞台话筒

{"ops":[{"insert":"Beta 87A \u4eba\u58f0\u8bdd\u7b52\uff0c\u8d85\u5fc3\u5f62\u7535\u5bb9\u3001\u5b9a\u5236\u54cd\u5e94 \u00a0\u8212\u5c14Beta 87A\u578b\u662f\u4e00\u6b3e\u8d28\u91cf\u4e00\u6d41\u7684\u8d85\u5fc3\u5f62\u624b\u6301\u5f0f\u7535\u4ecb\u8d28\u7535\u5bb9\u4eba\u58f0\u8bdd\u7b52\uff0c\u5177\u6709\u5e73\u6ed1\u7684\u9891\u7387\u54cd\u5e94\u548c\u9ad8\u58f0\u538b\u7ea7 (SPL) \u5904\u7406\u80fd\u529b\u3002\u7528\u4e8e\u4e13\u4e1a\u7684\u6269\u97f3\u3001\u5e7f\u64ad\u548c\u5f55\u97f3\u68da\u5f55\u97f3 \u5e94\u7528\uff0cBeta 87A\u65e2\u6709\u5353\u8d8a\u7684\u6027\u80fd\uff0c\u53c8\u6709\u65c5\u884c\u548c\u73b0\u573a\u751f\u4ea7\u6240\u9700\u7684\u7ed3\u5b9e\u6027\u3002 \u00a0\r\n \r\n\tBeta 87A\u7684\u7279\u70b9\u662f\u5177\u6709\u53ef\u63a7\u5236\u7684\u4f4e\u9891\u8870\u51cf\uff0c\u53ef\u4ee5\u8865\u507f\u90bb\u8fd1\u6548\u5e94\uff0c\u5e76\u53ef\u9632\u6b62\u8fd1\u8ddd\u79bb\u62fe\u97f3\u65f6\u7ecf\u5e38\u4f1a\u51fa\u73b0\u7684\u201c\u7830\u7830\u201d\u58f0\u3002\u7279\u6709\u7684\u8212\u5c14\u6027\u80fd\u63d0\u5347\u8ba9\u4e2d\u9891\u533a\u9ad8\u6bb5\u7684\u97f3\u8d28\u66f4\u52a0\u660e\u4eae\u3002\u7d27\u51d1\u7684\u8d85\u5fc3\u5f62\u6a21\u5f0f\u96f6\u70b9\u5728 125 \u5ea6\u9644\u8fd1\uff0c\u53ef\u4ee5\u5728\u6700\u5927\u7a0b\u5ea6\u4e0a\u9694\u79bb\u5176\u5b83\u6b4c\u624b\u6216\u4e50\u5668\uff0c\u540c\u65f6\u5c06\u79bb\u8f74\u5e72\u6270\u964d\u5230\u6700\u4f4e\u3002BetaBeta 87A\u91c7\u7528\u5e7b\u8c61\u7535\u6e90\u3002 \u00a0\r\n \r\n\tBeta 87A- \u5305\u62ec\u652f\u67b6\u8f6c\u63a5\u5668\u3002\u7535\u7f06\u4e0d\u5305\u62ec\u5728\u5185\u3002 \u00a0\r\n \r\n\t\u5e73\u6ed1\u7684\u9891\u7387\u54cd\u5e94\uff0c\u6e10\u8fdb\u5f0f\u663e\u793a\u00a0\r\n \r\n\t\u9ad8\u5ea6\u5747\u8861\u7684\u8d85\u5fc3\u5f62\u62fe\u97f3\u6a21\u5f0f\u53ef\u4ee5\u63d0\u4f9b\u4f18\u5f02\u7684\u53cd\u9988\u524d\u589e\u76ca\u00a0\r\n \r\n\t\u7535\u5b50\u4f4e\u9891\u8870\u51cf\u53ef\u4ee5\u8865\u507f\u90bb\u8fd1\u6548\u5e94\u00a0\r\n \r\n\t\u52a8\u6001\u8303\u56f4\u5bbd (117 dB)\uff0c\u5931\u771f\u4f4e\u00a0\r\n \r\n\t\u5bf9\u5c04\u9891\u5e72\u6270\u548c\u7535\u78c1\u4ea4\u6d41\u58f0\u7684\u654f\u611f\u6027\u5f88\u4f4e\u00a0\r\n \r\n\t\u5148\u8fdb\u7684\u8bdd\u7b52\u5934\u51cf\u9707\u7cfb\u7edf\u53ef\u4ee5\u5438\u6536\u673a\u68b0\u51b2\u51fb\u5e76\u51cf\u5c11\u62ff\u63e1\u4ea7\u751f\u7684\u566a\u58f0\u00a0\r\n \r\n\t\u5185\u7f6e\u7684\u201c\u7830\u7830\u201d\u58f0\u8fc7\u6ee4\u5668\u53ef\u4ee5\u964d\u4f4e\u4e0d\u9700\u8981\u7684\u98ce\u58f0\u548c\u547c\u5438\u58f0\u00a0\r\n \r\n\t\u591a\u5e74\u65e0\u6545\u969c\u7684\u6027\u80fd\uff0c\u503c\u5f97\u4fe1\u8d56\u00a0\r\n \r\n\t\u8bdd\u7b52\u5934\u7c7b\u578b\uff1a\u7535\u5bb9\uff08\u7535\u4ecb\u8d28\u504f\u538b\uff09\r\n \r\n\t\u9891\u7387\u54cd\u5e94\uff1a50 \u81f3 20,000 HZ\r\n \r\n\t\u62fe\u97f3\u6a21\u5f0f\uff1a\u8d85\u5fc3\u5f62\u8f93\u51fa\u963b\u6297\uff1a\u989d\u5b9a\u963b\u6297\u4e3a 150 \u6b27\u59c6\uff08\u6709\u6548\u963b\u6297\u4e3a 100 \u6b27\u59c6 +\/- 20%\uff09 \u5efa\u8bae\u6700\u5c0f\u8d1f\u8f7d\u963b\u6297\uff1a800 \u6b27\u59c6\r\n \r\n\t\u7075\u654f\u5ea6(1,000 Hz)\uff1a \u5f00\u8def\u7535\u538b -52.5 dBV\/Pa (2 mV) \uff081 Pa = 94 dB \u58f0\u538b\u7ea7\uff09\u9650\u5e45\u7535\u5e73(1,000 Hz)\uff1a 1000 \u6b27\u59c6\u8d1f\u8f7d\uff1a-6 dBV (.5 V)\u6700\u5927\u58f0\u538b\u7ea7(1,000 Hz)\uff1a 140.5 dB\uff08\u603b\u8c10\u6ce2\u5931\u771f 0.25%\uff0c1000 \u6b27\u59c6\u8d1f\u8f7d\uff09\r\n \r\n\t\u81ea\u8eab\u566a\u58f0\uff1a\uff08\u7b49\u6548\u58f0\u538b\u7ea7\uff1b\u7528\u771f\u5b9e\u6709\u6548\u503c\u7535\u538b\u8868\u6d4b\u91cf\uff09 \u901a\u5e38\u4e3a 23.5 dB\uff0cA \u6743\u91cd \u901a\u5e38\u4e3a 25.5 dB\uff0c\u6743\u91cd\u6309\u7167 DIN 45 405\u52a8\u6001\u8303\u56f4\uff1a117 dB\uff08\u6700\u5927\u58f0\u538b\u7ea7\u81f3 A \u6743\u91cd\u566a\u58f0\u7535\u5e73\uff09\r\n \r\n\t\u4fe1\u566a\u6bd4\uff1a70.5 dB\uff0c94 dB \u58f0\u538b\u7ea7 (IEC 651) \uff08\u4fe1\u566a\u6bd4\u662f 94 dB \u58f0\u538b\u7ea7\u548c\u81ea\u8eab\u566a\u58f0 A \u6743\u91cd\u7b49\u6548\u58f0\u538b\u7ea7\u4e4b\u95f4\u7684\u5dee\u989d\u3002\uff09\r\n \r\n\t\u6781\u6027\uff1a\u632f\u819c\u4e0a\u7684\u6b63\u538b\u4f1a\u5728\u9488\u811a 2 \u4e0a\u4ea7\u751f\u6b63\u7535\u538b\uff08\u76f8\u5bf9\u4e8e\u9488\u811a 3\uff09\r\n \r\n\t\u7535\u6e90\uff1a\u5e7b\u8c61\u7535\u6e90\u8981\u6c42\uff1a11 \u81f3 52 Vdc\uff0c\u9488\u811a 2 \u548c 3 \u540c\u4e3a\u6b63 \u8017\u7528\u7535\u6d41\uff1a1.0 \u81f3 1.2 mA\u63a5\u5934\uff1a\u4e09\u9488 (XLR)\u00a0\r\n \r\n\t\u4e13\u4e1a\u97f3\u9891\u5916\u58f3\uff1a\u94dd\u8d28\u7ed3\u6784\uff0c\u84dd\u8272\u91d1\u5c5e\u9762\u6f06\uff0c\u52a0\u56fa\u7684\u94a2\u7f51\u7f69\u5e26\u6709\u4eae\u954d\u8272\u94ec\u9540\u5c42\r\n \r\n\t\u51c0\u91cd\uff1a207 \u514b\uff087.6 \u76ce\u65af\uff09\r\n"},{"insert":"\n"}]}