Resources Contact Us Home
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
Minimizing mismatch during compensation
Apparatus, method and program for image receipt, processing, conversion, and delivery to and from a plurality of external apparatuses
Systems and methods for optimizing capital structure of a financial institution
Methods and compositions for improving photodynamic therapy through administration of lipids
High density vertical structure nitride flash memory
Image processing device, image processing method, and program
Stable light source device
  Randomly Featured Patents
Maleic anhydride production
Lunch bag
Mounting structure for multiple liquid crystal displays
Composite door and frame
Method for regenerating scale solvent
Neural stimulation for increased contrast
Electrically heated hair curler
Method of manufacturing a radiation detector
Electromagnetically biased homopolar magnetic bearing
Fluid displacement apparatus with lubricating mechanism