CA42/50/52 Echosounder operation Chapter 7
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7.11 Transducer beamwidth
The transducer mounted to the hull of your vessel serves as both a
“speaker” when transmitting, and as a “microphone” when the echo-
sounder is receiving. Similar to the way a flashlight focuses light, most
of the sound from your transducer is focused downwards with a
smaller amount going out to the sides. The amount of focusing of the
sound beam is expressed as a “beamwidth”.
Transducer
Approximation of the
sound pattern below
the transducer
This angle is the
transducers beamwidth
½ maximum intensity
Maximum intensity
Figure 3 – A representation of a transducer beamwidth
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