Armored self-contained outdoor/indoor siren assembly
Audible alarm unit
Audible electronic warning system
Audible electronic warning system
Audible warning device for motor vehicles
Audio chime-signal generating circuit
Audio emitting tread mat system
Audio indicating system
Audio signal generator
Audio signalling device
Audio-detector alarm
Automatically sequenced signaling system
Back-lit graphic display panel apparatus
Binary alarm
Breadboard system
Buzzer assembly
Buzzer with electronic integrated oscillation circuit
Chime tone audio system utilizing a piezoelectric transducer
Circuit means for providing multiple audible signals from an aud
Contactless buzzer