L+R separation system
Laminated motor structure for electromagnetic transducer
Lapel microphone with push to talk switch
Laptop computer with loudspeaker(s)
Large scale sound reproduction system having cross-cabinet horiz
Large-area acoustic radiation system
Large-diameter arcuate speaker
Laser audio preamplifier, volume control, and multiplexer
Laser inclinometer audio direction
Lavalier microphone assembly
Lay-in ceiling speaker
Lay-in tile speaker system
LCD and speaker arrangement
Learning by provocation
Learning system of dictionary for speech recognition
Level adjustment apparatus
Level adjustment apparatus
Level adjustment circuit
Level control circuit for low and medium sound
Level indicating methods and means