Loud horn with respiration pipe and in particular for motor vehi
Loud speaker with horizontal radiation pattern
Low cost buzzer
Means for improving the electroacoustical properties of a buzzer
Method and apparatus for adjusting vehicle horns
Method for setting horn air gap
Miniature dual cavity ringer
Miniature sounder with double tuned cavity
Motor-vehicle horn
Paging receiver with resonant box
Planar acoustic converting apparatus
Reverse alarm
Self-tuning vehicle horn
Siren housing
Sound generating apparatus with sealed air chamber between two s
Sound generator for a parking assistance system
Sound production controller
Sound-reproducing transducer
Structure of buzzer
Thin buzzer