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| Number | Title | Issue Date |
| 5452359 | Acoustic signal reproducing apparatus An acoustic signal reproducing apparatus for supplying an acoustic signal to a headphone device, in which position-detecting reference signals from a reference signal source are sensed by a pair of signal sensors provided at two places over a listener's h... | 09/19/1995 |
| 5438623 | Multi-channel spatialization system for audio signals Synthetic head related transfer functions (HRTFs) for imposing reprogrammable spatial cues to a plurality of audio input signals included, for example, in multiple narrow-band audio communications signals received simultaneously are generated and stored i... | 08/01/1995 |
| 5371799 | Stereo headphone sound source localization system A system for processing an audio signal for playback over headphones in which the apparent sound source is located outside of the head of the listener processes the input signal as if it were made up of a direct wave portion, an early reflections portion,... | 12/06/1994 |
| 5333200 | Head diffraction compensated stereo system with loud speaker array A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first... | 07/26/1994 |
| 5181248 | Acoustic signal reproducing apparatus An acoustic signal reproducing apparatus for reproducing acoustic signals through headphone devices is disclosed. The left channel and right channel acoustic signals are provided by a device for processing the transmission characteristics with constant tr... | 01/19/1993 |
| 5136651 | Head diffraction compensated stereo system A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first... | 08/04/1992 |
| 5034983 | Head diffraction compensated stereo system A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment acoustics while retaining relative independence of listener movement. The system first... | 07/23/1991 |
| 5033086 | Stereophonic binaural recording or reproduction method A stereophonic binaural recording and reproduction method for audio signals presented to headsets. Signals of the left stereo channel are supplied to the left ear, weighted with the outer ear transmission function of the left ear for the angle range of be... | 07/16/1991 |
| 4589128 | Process for the production of a sound recording and a device for carrying out the process A process for the reproduction of a sound recording using headphones as the reproduction device, comprising connecting between the sound carrier and the reproduction device a reverberation reproducer, producing reverberation reflections within a period of... | 05/13/1986 |
| 4347405 | Sound reproducing systems utilizing acoustic processing unit A system for reproducing a plurality of electro-acoustic signals each corresponding, for example, to a channel signal of a multichannel electronic keyboard instrument, includes an acoustic processing unit which comprises a plurality of electro-acoustic tr... | 08/31/1982 |
| 4209665 | Audio signal translation for loudspeaker and headphone sound reproduction A signal translator includes right- and left-channel translating networks, each being constructed to have a transfer function 1/(A+B), where A is the transfer function of a direct acoustic path between a right-channel sound source and a listener's ear and... | 06/24/1980 |
| 4143244 | Binaural sound reproducing system A binaural sound reproducing system includes a transducer for translating the recorded binaural information into an electrical signal on each of separate channels and a convolution integrator on each separate channel connected to receive the output from t... | 03/06/1979 |
| 4136260 | Out-of-head localized sound reproduction system for headphone In stereo sound reproduction circuitry for use with a stereo signal source and stereo headphones, the improvement of dip filter means disposed between the stereo signal source and the stereo headphones, the dip filter means having a dip in the transmissio... | 01/23/1979 |
| 4097689 | Out-of-head localization headphone listening device A headphone device comprising a pair of headphones for receiving output signals from various acoustic apparatus, wherein a direct sound signal or an output signal of an acoustic apparatus is applied to a reverberation supply circuit to produce an indirect... | 06/27/1978 |
| 4087631 | Projected sound localization headphone apparatus The present invention relates to a headphone apparatus which is adapted to be connected, for headphone listening, to a reproduction apparatus for reproducing a program source such as a record, a magnetic tape or an acoustic apparatus such as a radio recei... | 05/02/1978 |
| 3984885 | 4-Channel headphones A structure of four-channel headphones having sound insulating means between front and rear channel driver units, and tone control means only for the front channel tones, said sound insulating means being formed of foam material which transmits low-pitche... | 10/12/1976 |
| 3970787 | Auditorium simulator and the like employing different pinna filters for headphone listening An auditorium simulator which is suitable for earphones or speakers placed closely to the ears, is comprised of delay and attenuation devices for simulating the various sound paths in an auditorium and includes listener simulating means for producing diff... | 07/20/1976 |
| 3962543 | Method and arrangement for controlling acoustical output of earphones in response to rotation of listener's head Sound signals are created at the eardrums of a listener to correspond to sound signals which would be created at the eardrums of the listener in a predetermined acoustical environment in response to first electrical signals applied to a loudspeaker having... | 06/08/1976 |
