It is a well-known fact that humans cannot hear the ultrasonic waves emitted by dolphins as they "talk" with each other or those sounds created by bats as they search for prey. Ultrasound is defined as low sound below 20 hertz and high sound above 20 kilohertz that cannot be heard by humans. The characteristics of ultrasound include: (1) It travels faster and farther as it moves through solids, liquids, and then gases, (2) It transmits only longitudinal waves in liquids and gases, whereas in solids it transmits surface, transverse, and longitudinal waves, and (3) It has a strong acoustic pressure and high energy density, even at a small rate of variation.

Honda's dedication to these inaudible sounds started in 1956 when it developed the world's first transistorized compact fish finder that became an instant success among sport fishermen in Japan. Since then, the brand name of Hondex has become the brand of choice among sport and professional fishermen not only in Japan but also North America.

As the leisure and professional markets matured for the fish finder, Honda Electronics surprised the industry once again with the development of ultrasonic diagnostic equipment in the field of medicine, as well as ultrasonic cleaning equipment. The former could enable bones to be viewed or even seen for closer examination on a personal computer, and the latter, such as the pulse-jet (flowing water type) and dyna-shock (multi-frequency type) have now become widely used in the manufacture of semiconductors. It has also been proven that ultrasound can be effective in removing residual chlorine in tap water or to aid in the breakdown of Freon solvents.

Honda Electronics maintains its pioneering role in establishing businessacademia collaborations in the Mikawa region. Its technology and advice are often sought after in manufacturing projects that include the application of ultrasound. Honda is proud to be the ultrasound specialist that has integrated everything in the flow from basic research to the final commercialization of products.