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Guide to Transducer Technology - AIRMAR

Guide to 10 0 10 . 20 20 . 30 30 . Transducer Technology 40 40 . 50 50 . 60 60 . 70 70 . 80 80 . How a Transducer Works What is a Transducer ? How Does a Transducer Know A good fishfinder depends on an efficient Transducer to send and receive How Deep the Water is? signals. The Transducer is the heart of an echosounder system. It is the The echosounder measures the time between transmitting the sound and device that changes electrical pulses into sound waves or acoustic energy receiving its echo. Sound travels through the water at about 1,463 m/s and back again. In other words, it is the device that sends out the sound (4,800 ft/s), just less than a mile per second. To calculate the distance to the waves and then receives the echoes, so the echosounder can interpret or object, the echosounder multiplies the time elapsed between the sound detect what is below the surface of the water.

Sound waves are ultrasonic. Most fi sh are unable to hear frequencies higher than about 500 Hz to 1 kHz. The ultrasonic sound waves sent out by Airmar transducers have frequencies ranging from 10 kHz to 2 MHz (10,000 Hz to 2,000,000 Hz), clearly beyond the hearing of fi sh. They are also above

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  Guide, Technology, Ultrasonic, Transducer, Guide to transducer technology

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