In technical normal state air the initial phase of a 310Hz
frequency, 0.07Pa sound pressure amplitude...
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In technical normal state air the initial phase of a 310Hzfrequency, 0.07Pa sound pressure amplitude free, plane wavetraveling in +x direction is 60degree. Determine the sound pressurein the sound field 18minutes later, 175m far from the origin! Letcalculate the sound pressure level as well, in the same place!
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At normal state the speed of air is given as 343ms Sowavelength for this frequency is given as 343ms310Hz
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