Reveals a World of Sound Unheard by humans
This amazing detector picks up ultrasounds that are normally inaudible to the human ear. Tune your Discovery Kids Ultrasonic Detector into the hidden sounds that surround us such as combing hair, fluorescent lights, rattling keys tearing paper, rubbing fabric and of course bats. Requires 1 x 9V battery (not included).
Features: 20,000Hz to 100,000Hz frequency range, Frequency and volume controls, Lightweight hand-held unit, ON/OFF switch.
What is ultrasonic detector?
Ultrasonic transducers are divided into three broad categories: transmitters, receivers and transceivers. Transmitters convert electrical signals into ultrasound, receivers convert ultrasound into electrical signals, and transceivers can both transmit and receive ultrasound.
In a similar way to radar and sonar, ultrasonic transducers are used in systems which evaluate targets by interpreting the reflected signals. For example, by measuring the time between sending a signal and receiving an echo the distance of an object can be calculated. Passive ultrasonic sensors are basically microphones that detect ultrasonic noise that is present under certain conditions.
Suitable from 8 yrs+