声波330米一秒。那么波长4米的波频率是多少？ 声波的波长是多少
\u4eba\u53ef\u542c\u5230\u6700\u9ad8\u9891\u7387\u58f0\u97f3\u7684\u6ce2\u957f\uff0c\u58f0\u901f330\u7c73\u6bcf\u79d2\u6ce2\u957f=\u6ce2\u901f/\u9891\u7387\uff0c
\u7406\u8bba\u4e0a\u4eba\u7c7b\u80fd\u542c\u5230\u7684\u6700\u9ad8\u9891\u7387\u662f20000Hz\uff0c\u6240\u4ee5\u6309\u4e0a\u9762\u516c\u5f0f\u7b97\u51fa\u6765\u5927\u6982\u662f0.0165\u7c73\u3002
\u4f46\u5b9e\u9645\u4e0a\uff0c\u4e00\u822c\u6bd4\u8fd9\u4e2a\u6570\u503c\u8981\u5927\u4e00\u4e9b\u3002\u6211\u4ee5\u524d\u505a\u8fc7\u5b9e\u9a8c\uff0c\u5f88\u591a\u6210\u5e74\u7537\u5b50\u542c\u4e0d\u5230\u9891\u7387\u572812KHz\u4ee5\u4e0a\u7684\u58f0\u97f3\uff0c\u6210\u5e74\u5973\u5b50\u542c\u5230\u7684\u9891\u7387\u66f4\u9ad8\u4e00\u4e9b\uff0c\u6709\u4e9b\u53ef\u4ee5\u542c\u523015KHz\uff0c\u4f46\u7406\u8bba\u4e0a\u6700\u9ad8\u9891\u738720KHz (20000Hz)\u5728\u6211\u90a3\u6279\u5b9e\u9a8c\u5bf9\u8c61\u4e2d\uff0c\u8fd8\u771f\u6ca1\u4e00\u4e2a\u4eba\u53ef\u4ee5\u542c\u5230\u3002\u770b\u6765\u542c\u529b\u8303\u56f4\u8fd8\u771f\u662f\u6709\u70b9\u5929\u751f\u7684\uff0c\u53ea\u6709\u5c11\u6570\u4eba\u53ef\u80fd\u62e5\u6709\uff0c\u6b63\u5982\u5e15\u74e6\u7f57\u8482\u7684\u91d1\u55d3\u5b50\u4e0d\u662f\u6bcf\u4e2a\u4eba\u90fd\u6709\u7684\u4e00\u6837\u3002
\u58f0\u6ce2\u7684\u6ce2\u957f\uff1a0.017--17\u7c73\u3002
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\u53d1\u58f0\u4f53\u7684\u632f\u52a8\u5728\u7a7a\u6c14\u6216\u5176\u4ed6\u7269\u8d28\u4e2d\u7684\u4f20\u64ad\u53eb\u505a\u58f0\u6ce2\u3002\u58f0\u6ce2\u501f\u52a9\u5404\u79cd\u4ecb\u8d28\u5411\u56db\u9762\u516b\u65b9\u4f20\u64ad\u3002\u58f0\u6ce2\u662f\u4e00\u79cd\u7eb5\u6ce2\uff0c\u662f\u5f39\u6027\u4ecb\u8d28\u4e2d\u4f20\u64ad\u7740\u7684\u538b\u529b\u632f\u52a8\u3002\u4f46\u5728\u56fa\u4f53\u4e2d\u4f20\u64ad\u65f6\uff0c\u4e5f\u53ef\u4ee5\u540c\u65f6\u6709\u7eb5\u6ce2\u53ca\u6a2a\u6ce2\u3002
\u6269\u5c55\u8d44\u6599\u58f0\u6ce2\u662f\u58f0\u97f3\u7684\u4f20\u64ad\u5f62\u5f0f\u3002\u58f0\u6ce2\u662f\u4e00\u79cd\u5e73\u884c\u6ce2\uff0c\u7531\u7269\u4f53\uff08\u58f0\u6e90\uff09\u632f\u52a8\u4ea7\u751f\uff0c\u58f0\u6ce2\u4f20\u64ad\u7684\u7a7a\u95f4\u5c31\u79f0\u4e3a\u58f0\u573a\u3002\u5728\u6c14\u4f53\u548c\u6db2\u4f53\u4ecb\u8d28\u4e2d\u4f20\u64ad\u65f6\u662f\u4e00\u79cd\u7eb5\u6ce2\uff0c\u4f46\u5728\u56fa\u4f53\u4ecb\u8d28\u4e2d\u4f20\u64ad\u65f6\u53ef\u80fd\u6df7\u6709\u6a2a\u6ce2\u3002\u4efb\u4f55\u5668\u5b98\u6240\u63a5\u6536\u7684\u58f0\u97f3\u9891\u7387\u90fd\u6709\u5176\u8303\u56f4\u9650\u5236\u3002
\u4eba\u8033\u53ef\u4ee5\u542c\u5230\u7684\u58f0\u6ce2\u7684\u9891\u7387\u4e00\u822c\u572820Hz\uff08\u8d6b\u5179\uff09\u81f320kHz\u4e4b\u95f4\u3002\u5176\u4ed6\u52a8\u7269\u7684\u542c\u89c9\u9891\u7387\u8303\u56f4\u6709\u6240\u4e0d\u540c\uff0c\u50cf\u72d7\u53ef\u4ee5\u542c\u5230\u8d85\u8fc720kHz\u7684\u8d85\u58f0\u6ce2\uff0c\u4f46\u65e0\u6cd5\u542c\u523040 Hz\u4ee5\u4e0b\u7684\u58f0\u97f3\u3002
\u6839\u636e\u58f0\u6ce2\u9891\u7387\u7684\u4e0d\u540c\uff0c\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a
\u9891\u7387\u4f4e\u4e8e20Hz\u7684\u58f0\u6ce2\u79f0\u4e3a\u6b21\u58f0\u6ce2\u6216\u8d85\u4f4e\u58f0\uff1b
\u9891\u738720Hz~20kHz\u7684\u58f0\u6ce2\u79f0\u4e3a\u53ef\u95fb\u58f0\uff1b
\u9891\u738720kHz~1GHz\u7684\u58f0\u6ce2\u79f0\u4e3a\u8d85\u58f0\u6ce2\uff1b
\u9891\u7387\u5927\u4e8e1GHz\u7684\u58f0\u6ce2\u79f0\u4e3a\u7279\u8d85\u58f0\u6216\u5fae\u6ce2\u8d85\u58f0\u3002
\u9664\u4e86\u7a7a\u6c14\uff0c\u6c34\u3001\u91d1\u5c5e\u3001\u6728\u5934\u7b49\u5f39\u6027\u4ecb\u8d28\u4e5f\u90fd\u80fd\u591f\u4f20\u9012\u58f0\u6ce2\uff0c\u5b83\u4eec\u90fd\u662f\u58f0\u6ce2\u7684\u826f\u597d\u4ecb\u8d28\u3002\u5728\u771f\u7a7a\u72b6\u6001\u4e2d\u56e0\u4e3a\u6ca1\u6709\u4efb\u4f55\u5f39\u6027\u4ecb\u8d28\uff0c\u6240\u4ee5\u58f0\u6ce2\u5c31\u4e0d\u80fd\u4f20\u64ad\u4e86\u3002
\u58f0\u6ce2\u5728\u56fa\u4f53\u4ecb\u8d28\u4e2d\u4f20\u64ad\u65f6\uff0c\u7531\u4e8e\u4ecb\u8d28\u7684\u7c98\u6ede\u6027\u800c\u9020\u6210\u8d28\u70b9\u4e4b\u95f4\u7684\u5185\u6469\u64e6\uff0c\u4ece\u800c\u4f7f\u4e00\u90e8\u5206\u58f0\u80fd\u8f6c\u53d8\u4e3a\u70ed\u80fd\uff1b\u540c\u65f6\uff0c\u7531\u4e8e\u4ecb\u8d28\u7684\u70ed\u4f20\u5bfc\uff0c\u4ecb\u8d28\u7684\u7a20\u5bc6\u548c\u7a00\u758f\u90e8\u5206\u4e4b\u95f4\u8fdb\u884c\u70ed\u4ea4\u6362\uff0c\u4ece\u800c\u5bfc\u81f4\u58f0\u80fd\u7684\u635f\u8017\uff0c\u8fd9\u5c31\u662f\u4ecb\u8d28\u7684\u7ecf\u5178\u5438\u6536\u73b0\u8c61\u3002\u901a\u5e38\u8ba4\u4e3a\uff0c\u5438\u6536\u8870\u51cf\u4e0e\u58f0\u6ce2\u9891\u7387\u7684\u4e00\u6b21\u65b9\u3001\u9891\u7387\u7684\u5e73\u65b9\u6210\u6b63\u6bd4\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1-\u58f0\u6ce2
那么频率=波速/波长
330/4=82.5
所以该声波的频率是82.5Hz
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绛旓細t鏄懆鏈2銆 娉㈠姩鏂圭▼鍙互鍐欑粍asin(wt-kx)=0.01*sin(200*pi*t-pi/2 * x)z鏄窛娉㈡簮鐨勮窛绂伙紝k鏄尝鏁帮紝k=2*pi/lambda锛宭ambda鏄娉㈤暱涓烘尝閫熶箻浠ュ懆鏈=4m銆備簬鏄痥=pi/23銆佸甫鍏=8锛屼篃杩樻槸0.01*sin(200*pi*t)4銆佺浉浣嶅樊灏辨槸pi/2锛屽垎鍒惂x=9鍜10甯﹀叆锛屽彂鐜扮浉宸畃i/2 ...
绛旓細t鏄懆鏈2銆 娉㈠姩鏂圭▼鍙互鍐欑粍asin(wt-kx)=0.01*sin(200*pi*t-pi/2 * x)z鏄窛娉㈡簮鐨勮窛绂伙紝k鏄尝鏁帮紝k=2*pi/lambda锛宭ambda鏄娉㈤暱涓烘尝閫熶箻浠ュ懆鏈=4m銆備簬鏄痥=pi/23銆佸甫鍏=8锛屼篃杩樻槸0.01*sin(200*pi*t)4銆佺浉浣嶅樊灏辨槸pi/2锛屽垎鍒惂x=9鍜10甯﹀叆锛屽彂鐜扮浉宸畃i/2 ...
绛旓細t鏄懆鏈2銆 娉㈠姩鏂圭▼鍙互鍐欑粍asin(wt-kx)=0.01*sin(200*pi*t-pi/2 * x)z鏄窛娉㈡簮鐨勮窛绂伙紝k鏄尝鏁帮紝k=2*pi/lambda锛宭ambda鏄娉㈤暱涓烘尝閫熶箻浠ュ懆鏈=4m銆備簬鏄痥=pi/23銆佸甫鍏=8锛屼篃杩樻槸0.01*sin(200*pi*t)4銆佺浉浣嶅樊灏辨槸pi/2锛屽垎鍒惂x=9鍜10甯﹀叆锛屽彂鐜扮浉宸畃i/2 ...
绛旓細t鏄懆鏈2銆 娉㈠姩鏂圭▼鍙互鍐欑粍asin(wt-kx)=0.01*sin(200*pi*t-pi/2 * x)z鏄窛娉㈡簮鐨勮窛绂伙紝k鏄尝鏁帮紝k=2*pi/lambda锛宭ambda鏄娉㈤暱涓烘尝閫熶箻浠ュ懆鏈=4m銆備簬鏄痥=pi/23銆佸甫鍏=8锛屼篃杩樻槸0.01*sin(200*pi*t)4銆佺浉浣嶅樊灏辨槸pi/2锛屽垎鍒惂x=9鍜10甯﹀叆锛屽彂鐜扮浉宸畃i/2 ...
