Acoustic detection of machinery malfunction
Adaptive intelligent electronic horn
Addressable speaker system
Alarm tone generating circuit for a radio paging receiver
Alerting system for a communication device
Ambient condition detector with variable pitch alarm
Animal warning alarm device
Apparatus for providing artificial sounds in the vicinity of a t
Audible signal device and machines using same
Audio closure
Buzzer assembly
Buzzer damping sound producing device
Buzzer-driving apparatus
Control circuit for an alarm tone generator
Decorative door bell actuator
Device for generating sound
Directional acoustic alerting system
Directional acoustic device
Electric bell having a mechanism for supporting electromagnetic
Electro-magnetic audio transducer for surface-mounted devices