Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Acoustic reproducing apparatus










Image Number 3 for United States Patent #5412733.

The present invention relates to an acoustic reproducing apparatus which is suitable particularly for listening to reproduced sound with noise through an open-air-type head phone. A sound leakage frequency band, when a head phone is loaded is measured in advance, and operation of a filter attenuating that sound leakage frequency band is changed-over. Thereby the sound leakage from the head phone to the outside in the loaded state is controlled. Also, a noise frequency characteristic is measured in advance, the low frequency band is intensified so as to correspond to that characteristic, and operation of the filter for attenuating the high frequency band containing the above-mentioned sound leakage frequency band is controlled to be changed-over.








 
 
  Recently Added Patents
Semiconductor apparatus
Electrical terminal
Prompt gap varying optical filter, analytical instrument, optical device, and characteristic measurement method
Method, system and computer program product for managing funds in custodial deposit accounts
Hypallergenic mosaic antigens and methods of making same
Fluid handling structure, a lithographic apparatus and a device manufacturing method
Linear transformer power supply
  Randomly Featured Patents
System for vehicle safety devices
Method for manufacturing tube and fin heat exchanger with reduced tube diameter
Blade part in turbofan
Process for the preparation of fluorocarbon waxes
Method for manufacturing leadframe, packaging method for using the leadframe and semiconductor package product
Exendin improves .beta.-cell response in subjects with impaired glucose tolerance
Aqueous dye preparations
Solenoid valve controlled all-wheel drive hydraulic coupling assembly
Tilt indicator for firearms
ACM and fixed coding and modulation of hierarchical layers