The heart of all piezoelectric sound generators is a simple piezoceramic disk that is coated with a layer of silver and glued together with a metal carrier plate. When the plate is driven by an external resonant circuit, the piezo tone generator is called a piezoelectric transducer. When the disk is driven by a built-in oscillating circuit, it is a piezoelectric buzzer.

The advantage of these simple structured acoustic components is their robustness and cost-effective sound solution.

Piezo sound generators are the ideal choice for applications that require a simple sound signal in a small frequency range, e.g. warning and control sound signals from household appliances, medical and health care products. The size range of piezo sound generators goes from the miniaturized size of 9 mm × 9 mm × 1.8 mm up to ø of 60 mm and covers tones in a range from low soft sound to aggressively loud sound. The design of almost all piezoelectric sound generators is adjusted to meet the most popular frequencies in the range between 2000 Hz and 5000 Hz.

Operating temperature range is from – 40 ° C to + 120 ° C. Standard voltage range is between 3 V and 12 V, in special cases according to customer requirements, higher voltages are possible. Piezo sound generators give with pins, wires or SMD pads.

Karl Kruse offers a wide range of Transducers, such as:

  • Magnetic Transducer
  • External Drive Piezo Transducer
  • Self Drive Piezo Transducer


Manufacturers & Contacts

  • DB Products Limited is a professional acoustic components manufacturer. Since our early establishment in 1976, research and development is and always been one of our key of success. We designs and manufactures some of the leading components that is now using in the world market, currently we have over 4,000 different models, and the number is still growing everyday.
  • Hua-Jie was established in 1989, and currently is headquartered in Taoyuan, Taiwan. With 30 years of R&D and production experience, they  provide various switches and electroacoustic products manufactured for different industries.
  • Midas range of sensor products includes; open/sealed ultrasonic transmitters, receivers, and transducers, as well as atomisers, ultrasonic ranging ICs and modules, ranging accessories, and pressure film sensors.

Klaus P. Kruse

Managing Director & Purchase/Sales Director