Thanks to both of you, It makes a bit more sense now. I now understand why constructive interference only can go up 6 dB.
If I reduced the sound in dB all the way to zero by making destructive interference, how much would I then have reduced the amplitude? And no, I don't understand the way...
How did you find out that a cancellation of -10dB is a reduction in amplitude to 1/3? And what do you mean by the ratio of the two amplitudes at the actual point of cancellation being 3:2 - leaving 1/3? I don't know why, but I just don't understand why the contructive interference only can raise...
I don't really understand this. Why wouldn't I expect the intensity of a constructive interfernce to be equal to the destructive? Could you perhaps elaborate it?
I don't see how the variation of signal levels through out the path between the speakers can cause the problem? Doesn't the sound...
Thanks for the answer. Unfortunately, I do not have more time to make the experiment again. Do you have any ideas why I didn't get that standing wave pattern? According to the theory, there should be constructive interference at the center, but nothing happens in the data I've collected... I...
I collected this data by moving a sound level meter slowly through a total length of 0,75 meter between two speakers pointing towards each other. The wavelength of the sine waves was 0,343 meters and the frequency was 1000 Hz. The sound level meter measured the sound in dbA 20 times a second...