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I am trying to implement a simple phased array of 7 transmitters rated 40 kHz. I have a few receivers to measure the acoustic field generated to validate if it works. What is a simple way to measure the polarity as I am skeptical to just use the marked polarity.

Thanks!

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    \$\begingroup\$ A link to the data sheet might help. \$\endgroup\$ – Andy aka Oct 2 '19 at 10:13
  • \$\begingroup\$ what error analysis have you done, regarding effect of different resonant frequencies in your seven TX circuits? \$\endgroup\$ – analogsystemsrf Oct 2 '19 at 12:05
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One approach that I used when I was a sonar engineer is to energize the transmitters one at a time. Measure the output which should increase every time a new transmitter is added. If the level decreases, then the transmitter is probably wired backwards.

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