231918 ⎘
Details of transducers, loudspeakers or microphones; Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only; Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means; Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
Sub-classes:MULTIFUNCTIONAL SOUND DEVICE
#2DISPLAY APPARATUS
#3BONE CONDUCTION SPEAKERS
#4MEMS environmental sensor and preparation method therefor
#5SPEAKERS
#6MEMS microphone
#7Electronic device with loudspeaker module
#8MEMS microphone and manufacturing method thereof
#9Display apparatus
#10MEMS microphone
#11Microphone assembly with back volume vent
#12Electro-acoustic transducer and electro-acoustic conversion device
#13Device for controlling a loudspeaker and associated sound reproduction facility
#14Acoustic protective cover assembly containing a retracted membrane material
#15Speaker box
#16SPEAKER AND IMAGE DISPLAY APPARATUS
#17Microphone unit for an action camera
#18Multi-microphone porting and venting structure for a communication device
#19Acoustic structure with passive diaphragm
#20Configurable speaker
#21Modular loudspeaker for point sound source and manufacturing method thereof
#22Vibrating panel device for electromagnetic vibrator and manufacture method thereof
#23Earphone with passive radiator
#24Electrically conductive membrane pump/transducer and methods to make and use same
#25Electrically conductive membrane pump/transducer and methods to make and use same
#26Speaker and its production method
#27Configurable speaker
#28Dual diaphragm dynamic microphone transducer
#29Dynamic microphone unit and dynamic microphone
#30Gas filled speaker volume
#31Three dimensional acoustic passive radiating
#32SPEAKER SYSTEM AND SOUND REPRODUCTION APPARATUS
#33MEMS microphone
#34Microphone bracket for cosmetic port with no mesh
#35Passive equalization for headphones