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
Squib control circuit
Cartridge for separating analyte from mixture, comprising dispensing and receiving chambers and insert
Methods and systems for improved engine speed control during engine starting
Image forming device
Triazine ring-containing polymer and film-forming composition comprising same
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
Single-lens reflex digital camera which displays an image for live view
  Randomly Featured Patents
Traveling siphon sludge collector
Method and apparatus for forward error correction in packet networks
Method and apparatus for dynamic detection and routing of non-uniform traffic in parallel buffered multistage interconnection networks
Feeding device for feeding recording medium
Human readable sentences to represent complex color changes
Tile, angle-cutting gauge
Striker for exothermic cutting electrodes
Method for establishing a surface consistent correction for the effects of the low velocity layer in seismic data processing
Composite interposer and method for producing a composite interposer
Polymerized oligopeptide-surfactant chiral micelles