Murata piezoelectric sounder produces world’s most detectable volume for driver warnings and notifications

  • Sound Components (Buzzer)


Murata Manufacturing Co., Ltd.
President/Statutory Representative Director:
Tsuneo Murata


Murata Manufacturing Co., Ltd. developed the world’s most distinctive surface mount piezoelectric sounder*1 for the automotive applications. This started mass production in October 2016.


The automotive market continues to develop and implement ADAS (advanced driver assistance systems) for use in the operation of next generation automobiles.
An increase in volume for sound emitting parts within the man-machine interface*2 has been needed for warnings and notifications during driving. Additionally, the previous generation of pin type sounders had problems with mounting defects and changes in sound quality. This prompted demand for reflow-capable parts with the high degree of reliability required in automotive applications. 
To meet this challenge, Murata applied its unique materials technology and high-level manufacturing processes to produce a surface mount piezoelectric sounder specifically for the automotive market, resulting in a new sounder that yields four times the sound of previous Murata products an increase of 10~12dB. The current aim is to increase adoption of the sounder in speedometers, power steering, power tailgates, parking assist systems, and other automobile technologies.

Site Identifier for the Product


• Provides world’s loudest volume for a surface mount piezoelectric sounder.

Typ.: 100 dB (2kHz, +12Vo-p, squarewave, 10cm)

• Product Size


• Wide Operational Temperature Range

Allows automobile cabin environmental temperatures from -40 ~ +105°C.

• Allows reflow mounting as well as taping reel packaging.

Allows reflow mounting for effective countermeasure against irregular mounting and abnormal sound.

• Lightweight (1g or less), no electromagnetic noise

Uses a simple structure having no magnet or coil, which reduces the impact of electromagnetic noise on surrounding circuits, and contributes to lighter devices.

• Low Consumption Power

Less than a tenth of the power consumption of comparable electromagnetic components.

Explanation of Terms

*1 Piezoelectric Sounder: A component that emits sound by using piezoelectric effect to vibrate a sound generating piece when an electric signal is applied.
The piezoelectric sounder incorporates a piezoelectric vibration plate in a plastic case (resonator) and generates sound by input of an external signal. A piezoelectric buzzer has an oscillation circuit built into the case of the piezoelectric sounder, so it generates sound simply by adding direct voltage from a battery, for example. The currently launched product is a surface mount piezoelectric sounder.

*2 Man-Machine Interface: This is a device or software that acts as an intermediary between a human and a machine during information exchange.

Murata in Brief

Murata Manufacturing Co., Ltd. is a worldwide leader in the design, manufacture and sale of ceramic-based passive electronic components & solutions, communication modules and power supply modules. Murata is committed to the development of advanced electronic materials and leading edge, multi-functional, high-density modules. The company has employees and manufacturing facilities throughout the world. For more information, visit Murata's website at