Transducer Beamwidth - Simrad CE34 ChartSounder Manual

CE34/44/54 Echo menu

4.9 Transducer beamwidth

The transducer mounted to the hull of your vessel serves as both
a 'speaker' when transmitting, and as a 'microphone' when the
echosounder 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'.
Approximation of the sound
pattern below the transducer
This angle is the transducer's
The center of the sound beam is the most intense, then as you move
out towards the sides of the sound beam there is a point where the
intensity of the sound is half what it was in the center. The distance
moved is the 'beamwidth'. See Fig. 3.
Transducer
beamwidth
1/2 maximum intensity
Maximum intensity
Fig. 3 A representation of a transducer bemwidth.
Chapter 4-11