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	<title>Hearing &#38; Orthopedic Care</title>
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	<description>Hearing &#38; Orthopedic Products</description>
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		<title>Sound Amplifier Hearing</title>
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		<pubDate>Fri, 18 Jun 2010 12:23:17 +0000</pubDate>
		<dc:creator>Charlie</dc:creator>
				<category><![CDATA[Hearing & Orthepedic]]></category>
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		<category><![CDATA[ear]]></category>
		<category><![CDATA[ear sound amplifier hearing aid]]></category>
		<category><![CDATA[hearing]]></category>
		<category><![CDATA[personal sound amplifier hearing]]></category>
		<category><![CDATA[personal sound amplifier hearing aid]]></category>
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Sound and Hearing?
 
Two identical loudspeakers are located at points A and B, 2.00m apart. The loudspeakers are driven by the same amplifier and produce sound waves with a frequency of 784Hz. Take the speed of sound in air to be 344m/s. A small microphone is moved out from  point B along a line [...]]]></description>
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