How does a transducer?
The easiest way to understand how a transducer functions is to think of it as a speaker and microphone integrated into one unit. A transducer receives sequences of electrical pulses at high voltage from the sounder. Just as home stereo speakers, the transducer then converts the transmission of impulses into sounds. the sound travels through the water as pressure waves. When a wave hits an object like a weed, a rock, a fish, or the bottom, the wave bounces. the wave is called eco-just like your voice to a canyon wall.
When the sound wave bounces, the transducer acts as a microphone. It receives the sound wave during the time between each transmitted pulse and converts it into electrical energy. A transducer will use about 1% of the time in transmission and 99% of his time in silence waiting for echoes. These time periods are measured in microseconds, so the time between pulses is very short. The 'depth sounder can calculate the time difference between a transmitted pulse and the return echo and then display the information on the screen so that can be easily understood by the user.