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
Process for the preparation of morphinane analogues
Estrogen receptor ligands
Method of making a CIG target by spray forming
Puncture resistant fabric
Ni-, Co-, and Mn- multi-element doped positive electrode material for lithium battery and its preparation method
Methods and devices for rapid and specific detection of multiple proteins
Charged-particle beam lens
  Randomly Featured Patents
Leak catching pipe flange
Personnel emergency carrier vehicle
Upper folder drive roll arrangement
Method for manufacturing articles in the form of slabs or blocks with acrylic binder
Shock absorber
Coffee bean roaster
Automatic lathe with rotary cutter
Coil bobbin and sealing coupler
Expandable stents and method for making same
Compressor having pulsating reducing mechanism