Some crystals generate electrical energy when mechanical stress is applied and deform when electrical field is applied. Such behavior is called piezoelectric property. Some ceramics display extraordinary piezoelectric properties. Murata has conducted extensive research into the piezoelectric properties of ceramics to greatly enhance the performance of electronic and communications equipment. Murata offers various piezoelectric products including the CERAFIL ceramic filter, which filters necessary signals to realize superior image and sound reproduction in televisions and radios; the CERALOCK timing clock device for microcomputers; piezoelectric sound components; shock sensors; piezoelectric gyroscopes used for image stabilization in cameras and for automobile navigation systems; and ultrasonic sensors for back sonar systems.