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phy131studiof15:lectures:chapter18 [2015/11/09 08:42] mdawber [Reflection and transmission] |
phy131studiof15:lectures:chapter18 [2015/11/09 08:51] mdawber [Interference between two speakers] |
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- | If the waves propagate from the source in all 3 dimensions then we need to take in to account that as we showed in [[phy141:lectures:27&#energy_in_a_wave|lecture 27]], $A\propto\frac{1}{r}$. To determine [[phy141:lectures:29&#loudness_and_decibels|perceived loudness]] we need to remember that it depends logarithmically on intensity. I have factored these considerations in the following calculations I performed in Maple. The patterns are for two speakers separated by 1m. | + | If the waves propagate from the source in all 3 dimensions then we need to take in to account that as we showed in [[phy131studiof15:lectures:chapter17|chapter 17]], $A\propto\frac{1}{r}$. To determine [[phy141:lectures:29&#loudness_and_decibels|perceived loudness]] we need to remember that it depends logarithmically on intensity. I have factored these considerations in the following calculations I performed in Maple. The patterns are for two speakers separated by 1m. |

{{speakerinteference.png}}\\ | {{speakerinteference.png}}\\ |