Waterproof Piezo Speaker

Part No：F4114-23.5-05200P
1	Resonance Frequency (KHz)	20
2	Max Input Voltage (Vrms)	12
3	Capacitance at 1000Hz (nF)	200±30%
4	Sound Output at 30cm (dB)	≥95 at 20KHz Square Wave 5Vrms
5	Rated Freq. Range (Hz)	f0～40KHz
6	Operating Temperature (℃)	-20～+60
7	Storage Temperature (℃)	-30～+70
8	Weight (g)	5.1
9	Housing Material	Black ABS

Product Manual

Detail information:

The piezo speaker produces a sound that is above the human ear’s hearing range, that is, above 20 kHz.

Bird repellant, dog repellent, rat repellent, and other fields all employ it.

Ultrasound is a mechanical wave with a frequency of more than 16 kHz, which is higher than the range of human hearing.

A mechanical wave is a sound wave.

The human ear can detect it when its vibration frequency is between 20Hz and 20KHz, which is referred to as an audible sound wave.

Mechanical vibrations of a frequency lower than 20 Hz are known as infrasound waves, and they are inaudible to the human ear. However, many animals can detect them.

Infrasound waves, for example, can produce anomalous behaviors in many animals prior to an earthquake.

Microwaves are waves having a frequency between 3108 and 31011 Hz.

Ultrasound differs from audible sound waves in a number of ways.

Ultrasonic waves have a high degree of directivity and concentrated energy, allowing them to penetrate steel plates several meters thick with little energy loss. Ultrasonic waves have a remarkable capacity to permeate liquids and solids, particularly opaque materials. It has the ability to reach depths of tens of meters. The ultrasonic wave will cause a substantial reflection and form an echo when it meets the impurity or interface, and it can produce a Doppler effect when it hits a moving object.

Ultrasonic waves have good directivity and concentrated energy, so they have great penetrating power and can penetrate steel plates several meters thick without much energy loss. Ultrasound has a great ability to penetrate liquids and solids, especially in solids that are opaque to sunlight. It can penetrate to a depth of tens of meters. When the ultrasonic wave hits the impurity or the interface, it will produce a significant reflection and form an echo, and it can produce a Doppler effect when it hits a moving object.

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