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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8116468 | Stereophonic sound reproduction device A stereophonic sound reproduction device has a sound amplifying device that amplifies multi channel surround sound signals for respective channels and outputs the multi channel surround sound signals to a plurality of speakers that are located surrounding a listenin... | 02/14/2012 |
| 8116470 | Impulse response processing apparatus and reverberation imparting apparatus An impulse response processing apparatus is composed of a waveform divider, a time adjuster, an interpolation processor and a waveform synthesizer. The waveform divider divides an impulse response into a plurality of base blocks on a time axis. The time adjuster inc... | 02/14/2012 |
| 8116469 | Headphone surround using artificial reverberation A surround experience for headphones can be created using various techniques and tools. The described techniques and tools can be applied separately or in combination. For example, a surround experience can be created by splitting input audio channel signals into hi... | 02/14/2012 |
| 8094827 | Sound reproducing apparatus and sound reproducing system The present invention provides a sound reproducing system and a sound reproducing apparatus that can provide a high realistic sensation to a user, without having to do a troublesome task on the user's side. A surround-sound system (100) includes: an ar... | 01/10/2012 |
| 8059826 | Efficient and scalable parametric stereo coding for low bitrate audio coding applications The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, whic... | 11/15/2011 |
| 8041045 | Unnatural reverberation An electronic reverberation system employs a processor to produce a plurality of delays samples that are added to a direct signal to produce reverberant sound. The disclosed system generates or employs a list of gain value pairs that are produced based on control se... | 10/18/2011 |
| 8005234 | Method for synthesizing impulse response and method for creating reverberation An impulse response synthesis method is carried out by a dispersion calculation process for calculating a dispersion of phase characteristics in association with a given room based on a volume of the room, a degree of sound absorption of the room, and a distance bet... | 08/23/2011 |
| 7949141 | Processing audio signals with head related transfer function filters and a reverberator A method, an apparatus, and a software product to process a plurality of input audio signals. The apparatus accepts a plurality of input signals and includes a multi-input, multi-output reverberator arranged to generate a set of output signals including delayed reve... | 05/24/2011 |
| 7881479 | Audio processing method and sound field reproducing system An audio signal processing method comprises the steps of emitting a sound at a virtual sound image location in space on the outer side of a closed surface, generating measurement-based directional transfer functions corresponding to a plurality of positions on the c... | 02/01/2011 |
| 7876909 | Efficient filter for artificial ambience A circuit, method, and system for producing artificial ambience effect for an input audio signal, mono, stereo, or surround. The ambience effect enhances artificial reverberation, replaces artificial reverberation, or synthesizes extra audio channels, such as surrou... | 01/25/2011 |
| 7860256 | Artificial-reverberation generating device An artificial-reverberation generating device comprises in one embodiment a convolution engine in association with an impulse-response synthesizer. The impulse-response synthesizer preferably comprises a noise synthesizer and a control means for controlling one or m... | 12/28/2010 |
| 7853023 | Method and apparatus to reproduce expanded sound using mono speaker A method and apparatus to reproduce sound using a mono speaker, and a stereo sound system employing the same. The sound reproducing method can include: adding a first channel signal and a second channel signal of an input stereo signal or an input mono signal; sound... | 12/14/2010 |
| 7751574 | Reverberation apparatus controllable by positional information of sound source In a reverberation apparatus, a storage section stores a directional characteristic representing a directivity of generated sound at a sound generating point. A position determining section determines a position of the sound generating point within an acoustic space... | 07/06/2010 |
| 7702116 | Microphone bleed simulator The invention is a microphone bleed simulator which processes the audio signals recorded with one spot microphone and one room mic (or one spot mic alone) and simulates the sound that would be created in a typical studio recording environment wherein multiple spot m... | 04/20/2010 |
| 7606375 | Method and system for automatically generating world environmental reverberation from game geometry Reverberation parameters for one or more positions of interest are derived from graphics data used for displaying a computer-generated environment. For each position of interest for which reverberation parameters are desired, environmental parameters including dista... | 10/20/2009 |
| 7599501 | Single bit per-voice dry/wet reverb control A dry/wet bit for controlling dry and wet components of an output sound during processing of an input sound is provided. The bit is configurable by a program to indicate when to reverse the dry and wet components of the output sound. When the bit has a first value, ... | 10/06/2009 |
| 7561699 | Environmental reverberation processor A method and apparatus for processing sound sources to simulate environmental effects includes source channel blocks for each source and single reverberation block. The source channel blocks include direct, early reflection, and late reverberation blocks for conditi... | 07/14/2009 |
| 7522734 | Distributed acoustic reverberation for audio collaboration A distributed acoustic reverberator including a network audio connection between at least two separated locations is provided. When a sound is emitted at one of the locations, the reverberator provides a reverberation signal to that location with a procedure. An alg... | 04/21/2009 |
| 7522735 | Electronic circuit with spring reverberation effect and improved output controllability An electronic circuit for adding the effects of reverberation to a high impedance signal produced from an external audio source such as a guitar pickup or a high impedance microphone. The electronic circuit comprises a reverberation effects circuit having pre-amplif... | 04/21/2009 |
| 7474753 | Sound field control apparatus, signal processing apparatus, sound field control program, and signal processing program A sound field control apparatus which is capable of adjusting the number of outputs as required. The sound field control apparatus is comprised of a master device, and a plurality of salve devices serially connected in cascade to the master device. In the master dev... | 01/06/2009 |
| 7463740 | Sound data processing apparatus for simulating acoustic space A data processing apparatus is designed for simulating an acoustic characteristic of an acoustic space which contains a sound source for generating a sound and a sound receiving point for receiving the sound. In the apparatus, each of a plurality of characteristic c... | 12/09/2008 |
| 7403625 | Signal processing unit The invention relates to a signal processing unit including an input for receiving an audio signal, and an early pattern generator connected to the input, for defining a predefined early pattern generation. The early pattern generator establishes an output having N ... | 07/22/2008 |
| 7400734 | Method and apparatus for emulating audio effect The present invention provides an apparatus and a method for emulating audio. The apparatus comprises an echo device, a reverberation device, an audio source device and a first signal synthesizer. Wherein, the echo device receives an audio source signals and applies... | 07/15/2008 |
| 7388959 | Harmonic generator and pre-amp A Harmonic Generator for audio applications and a Pre-Amplifier circuit are combined to form a Harmonic Generator and Pre-Amplifier circuit. The Harmonic Generator is formed from a Buffer Circuit responsive to an input program signal for buffering the input program ... | 06/17/2008 |
| 7373123 | Multiple tuners in a single radio receiver A radio receiver having multiple AM/FM tuners. A first tuner and a second tuner may be connected with an antenna for generating a first and second composite audio output signal. A dual input digital signal processor may be connected with the first tuner and the seco... | 05/13/2008 |
| 7369668 | Method and system for processing directed sound in an acoustic virtual environment An acoustic virtual environment is processed in an electronic device. The acoustic virtual environment comprises at least one sound source (300). In order to model the manner in which the sound is directed, a direction dependent filtering arrangement (306,... | 05/06/2008 |
| 7369663 | Method of creating reverberation by estimation of impulse response The present invention is directed to creating sound reverberation. In accordance with a preferred embodiment, an apparatus estimates an impulse response for use in reproduction of a sound in a desired acoustic space. In particular, the apparatus collects space infor... | 05/06/2008 |
| 7366295 | Telephone signal generator and methods and devices using the same A method or device includes a telephone with an audio or video effects generator to produce audio or video effects that are transmitted as part of a signal from the telephone. ... | 04/29/2008 |
| 7343020 | Vehicle audio system with directional sound and reflected audio imaging for creating a personal sound stage Automotive audio systems that use directional planar magnetic transducers in a layout or placement configuration to provide direct or reflected audio imaging in stereo or surround sounds for individual passengers of an automotive vehicle with reduced crossed audio i... | 03/11/2008 |
| 7340407 | Sound control method A system for acoustical performance enhancement, where combinations of component solutions are tested or modeled and given performance ratings. A builder desiring an sound control upgrade forwards project information, such as building plans and the desired performan... | 03/04/2008 |
| 7339503 | Adaptive asynchronous sample rate conversion A system including a buffer, a feedback loop configured to generate a fractional delay from a ratio of a first number of samples written into the buffer to a second number of samples read from the buffer, and a variable fractional delay filter configured to generate... | 03/04/2008 |
| 7332668 | Wavetable audio synthesis system The present invention relates to an audio synthesis system for performing wavetable audio synthesis. The system comprises an instrument database, an analysis module, a memory, a judgment module, and a synthesis module. The instrument database is used for storing dat... | 02/19/2008 |
| 7289633 | System and method for integral transference of acoustical events A sound system for capturing and reproducing sounds produced by a plurality of sound sources. The system comprises a device for receiving sounds produced by the plurality of sound sources and converting the separately received sounds to a plurality of separate audio... | 10/30/2007 |
| 7276655 | Music synthesis system The invention relates to a music synthesis system for synthesizing a corresponding digital music output according to commands from a music data file. The music data file comprises a plurality of music data units. Each music data unit records related information of t... | 10/02/2007 |
| 7257230 | Impulse response collecting method, sound effect adding apparatus, and recording medium A TSP signal that is a measurement signal is generated N times by a signal generating portion. The generated TSP signals are supplied to a steel-echo apparatus. Reverberation generated by the steel-plate echo apparatus corresponding to the TSP signals is arranged N ... | 08/14/2007 |
| 7233673 | In-line early reflection enhancement system for enhancing acoustics An in-line early enhancement generation system comprises one or more microphones positioned close to one or more sound sources so as to detect predominantly direct sound, an early reflection generation stage which generates a number of delayed reproductions of the m... | 06/19/2007 |
| 7227959 | Multi-channel digital feedback reducer system The present invention provides method and apparatus that improve processing of acoustic signals by reducing acoustic feedback in an acoustic system. An aspect of the invention is a multi-channel digital feedback reducer (DFR) system that comprises a plurality of cha... | 06/05/2007 |
| 7224981 | Speech recognition of mobile devices Speech recognition in mobile processor-based devices may be improved by using location information. Location information may be derived from on-board hardware or from information provided remotely. The location information may assist in a variety of ways in improvin... | 05/29/2007 |
| 7217879 | Reverberation sound generating apparatus A reverberation apparatus is designed for generating a reverberation sound from an input sound with use of an impulse response based on an instruction. In the reverberation apparatus, a first storage section stores first impulse response data representative of a fir... | 05/15/2007 |
| 7218740 | Audio system An automotive in-cabin audio system comprising a plurality of speakers installed at different positions in the cabin is disclosed, in which the playback signal from a multichannel player having sources of at least three channels recorded therein is processed in acco... | 05/15/2007 |
