Patents by Inventor Akira Miki
Akira Miki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140262597Abstract: A tubular body having an air flow passage, wherein an area of a cross section, in a direction perpendicular to a tube axis, of a space enclosed with an inner wall of the tubular body increases toward an open end thereof, wherein a curvature of the inner wall at an end portion of the tubular body near the open end is repeatedly increased and decreased along a circumferential direction of the inner wall, and wherein, when the inner wall in a cross section of the end portion in the direction perpendicular to the tube axis is viewed from the tube axis, a convex portion at which the inner wall protrudes in a direction away from the tube axis and a concave portion at which the inner wall is recessed in a direction toward the tube axis are repeatedly formed along the circumferential direction.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: Yamaha CorporationInventors: Akira MIKI, Hirofumi Onitsuka
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Publication number: 20140262598Abstract: A bass reflex port having a tubular shape for air flows, wherein an angle of a first inner radial line with respect to a reference plane including a center axis of the bass reflex port differs from an angle of a second inner radial line with respect to the reference plane, the first line being orthogonal to the center axis and passing a first characteristic point on an inner circumference of the bass reflex port in a first transverse cross section perpendicular to the center axis, the second line being orthogonal to the center axis and passing a second characteristic point corresponding to the first characteristic point and located on the inner circumference in a second transverse cross section perpendicular to the center axis, the first transverse cross section and the second transverse cross section differing form each other in position in a direction of extension of the center axis.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: Yamaha CorporationInventors: Akira MIKI, Hirofumi ONITSUKA
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Patent number: 8678130Abstract: An audio apparatus includes a housing including a space which is enclosed at least one pair of opposite surfaces, and an open pipe including a first open end and a second open end positioned in the space. The open pipe has a pipe length of integral multiple of a substantially half wavelength of a stationary wave which is generated in the space. The first open end of the open pipe is disposed at a position of a substantial loop of the stationary wave which is generated in the space.Type: GrantFiled: September 7, 2012Date of Patent: March 25, 2014Assignee: Yamaha CorporationInventors: Yasuo Shiozawa, Hirofumi Onitsuka, Akira Miki
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Publication number: 20130062139Abstract: An audio apparatus includes a housing including a space which is enclosed at least one pair of opposite surfaces, and an open pipe including a first open end and a second open end positioned in the space. The open pipe has a pipe length of integral multiple of a substantially half wavelength of a stationary wave which is generated in the space. The first open end of the open pipe is disposed at a position of a substantial loop of the stationary wave which is generated in the space.Type: ApplicationFiled: September 7, 2012Publication date: March 14, 2013Applicant: Yamaha CorporationInventors: Yasuo SHIOZAWA, Hirofumi Onitsuka, Akira Miki
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Patent number: 8336311Abstract: A low-pressure-vapor-recovery turbine generator that effectively recovers low-pressure steam emitted from a high-pressure-side steam turbine to generate electric power is provided. A low-pressure-vapor-recovery turbine that recovers low-pressure steam emitted from a high-pressure-side steam turbine and is rotationally driven, a generator that generates electric power with a rotational output of the low-pressure-vapor-recovery turbine, and a condenser that condenses into liquid exhaust steam from the low-pressure-vapor-recovery turbine are provided. The low-pressure-vapor-recovery turbine, generator, and condenser are installed in a portable outer casing that can be transported.Type: GrantFiled: December 28, 2007Date of Patent: December 25, 2012Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shinji Ogino, Keiichi Meguro, Kohei Higaki, Akira Miki
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Patent number: 8271288Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.Type: GrantFiled: September 22, 2011Date of Patent: September 18, 2012Assignee: Yamaha CorporationInventors: Atsuko Ito, Yasushi Shimizu, Akira Miki, Masato Hata
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Patent number: 8265298Abstract: A hands-free loudspeaker system which is capable of achieving high-quality voice amplification without requiring a human speaker to move to a microphone or a microphone to be moved to a human speaker. A microphone whose input level has continued to be above a threshold value for not shorter than a predetermined time period is detected, based on input signals from dispersedly arranged microphones. An input signal from the microphone is selected and outputted to a loudspeaker at an output level or with a delay time, according to a location of the loudspeaker. A preset lowest threshold level is initially set to the threshold value, and an input level of the microphone higher than the threshold value is newly set to the same, while when the input level is lower than the threshold value, a lower value is set to the same in a step-by-step manner.Type: GrantFiled: February 12, 2010Date of Patent: September 11, 2012Assignee: Yamaha CorporationInventors: Atsuko Ito, Akira Miki, Shinichi Sawara
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Publication number: 20120016665Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.Type: ApplicationFiled: September 22, 2011Publication date: January 19, 2012Applicant: YAMAHA CORPORATIONInventors: Atsuko Ito, Yasushi Shimizu, Akira Miki, Masato Hata
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Patent number: 8098841Abstract: A sound field controlling apparatus for a public-address system comprises a microphone that picks up a sound of a speaker, a loudspeaker that sound a sound signal based on the sound picked up by the microphone, a sound source position detector that detects a position of a sound source, and a signal processor that controls a level, delay time and equalizing property of the sound signal output to the loudspeaker in accordance with the sound source position detected by the sound source position detector.Type: GrantFiled: September 14, 2006Date of Patent: January 17, 2012Assignee: Yamaha CorporationInventors: Shinichi Sawara, Akira Miki, Atsuko Ito
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Patent number: 8050931Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.Type: GrantFiled: March 19, 2008Date of Patent: November 1, 2011Assignee: Yamaha CorporationInventors: Atsuko Ito, Yasushi Shimizu, Akira Miki, Masato Hata
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Patent number: 7995768Abstract: A sound reinforcement system which enables handsfree and high-quality sound reinforcement without requiring a person who is speaking to move to a microphone or move a microphone. At least one microphone and a plurality of speakers are arranged in a room. A speaker output adjusting section outputs sound picked up by the microphone to the plurality of speakers at predetermined levels.Type: GrantFiled: January 27, 2006Date of Patent: August 9, 2011Assignee: Yamaha CorporationInventors: Akira Miki, Atsuko Ito
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Patent number: 7940938Abstract: A sound reproducing apparatus which can be relatively inexpensive as a whole and also be simple in construction with reduced wiring even in the case where many speakers are used. Pulse-width modulated (PWM) pulses are generated based on respective audio signals for multiple-channel speakers. PWM pulses are time-division multiplexed and amplified, and then output as digital driving signals. The multiple-channel speakers are selectively turned on/off such that the digital driving signals are supplied to the respective multiple-channel speakers of corresponding channels.Type: GrantFiled: May 11, 2006Date of Patent: May 10, 2011Assignee: Yamaha CorporationInventors: Akira Miki, Masayoshi Sahara
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Patent number: 7903539Abstract: An electronic control unit includes an input interface having multiplexer circuits, each of which circuits is supplied with input signals supplied from an outside of the electronic control unit, and a failsafe processing part that determines whether an abnormality occurs in the input interface by referring to a state of a specific multiplexer circuit that is at least one of the multiple multiplexer circuits when determining that an output signal of the input interface has an abnormal state and executes a failsafe process based on results of determination as to whether an abnormality occurs in the specific multiplexer circuit.Type: GrantFiled: February 22, 2007Date of Patent: March 8, 2011Assignee: Fujitsu Ten LimitedInventors: Takaaki Fukushima, Yousuke Matsumoto, Akira Miki
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Publication number: 20100150372Abstract: A hands-free loudspeaker system which is capable of achieving high-quality voice amplification without requiring a human speaker to move to a microphone or a microphone to be moved to a human speaker. A microphone whose input level has continued to be above a threshold value for not shorter than a predetermined time period is detected, based on input signals from dispersedly arranged microphones. An input signal from the microphone is selected and outputted to a loudspeaker at an output level or with a delay time, according to a location of the loudspeaker. A preset lowest threshold level is initially set to the threshold value, and an input level of the microphone higher than the threshold value is newly set to the same, while when the input level is lower than the threshold value, a lower value is set to the same in a step-by-step manner.Type: ApplicationFiled: February 12, 2010Publication date: June 17, 2010Applicant: Yamaha CorporationInventors: Atsuko Ito, Akira Miki, Shinichi Sawara
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Patent number: 7688986Abstract: A hands-free loudspeaker system which is capable of achieving high-quality voice amplification without requiring a human speaker to move to a microphone or a microphone to be moved to a human speaker. A microphone whose input level has continued to be above a threshold value for not shorter than a predetermined time period is detected, based on input signals from dispersedly arranged microphones. An input signal from the microphone is selected and outputted to each loudspeaker at an output level or with a delay time, according to a location of the loudspeaker. A preset lowest threshold level is initially set to the threshold value, and an input level of the microphone higher than the threshold value is newly set to the same, while when the input level is lower than the threshold value, a lower value is set to the same in a step-by-step manner.Type: GrantFiled: December 20, 2006Date of Patent: March 30, 2010Assignee: Yamaha CorporationInventors: Atsuko Ito, Akira Miki, Shinichi Sawara
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Publication number: 20100050638Abstract: A low-pressure-vapor-recovery turbine generator that effectively recovers low-pressure steam emitted from a high-pressure-side steam turbine to generate electric power is provided. A low-pressure-vapor-recovery turbine that recovers low-pressure steam emitted from a high-pressure-side steam turbine and is rotationally driven, a generator that generates electric power with a rotational output of the low-pressure-vapor-recovery turbine, and a condenser that condenses into liquid exhaust steam from the low-pressure-vapor-recovery turbine are provided. The low-pressure-vapor-recovery turbine, generator, and condenser are installed in a portable outer casing that can be transported.Type: ApplicationFiled: December 28, 2007Publication date: March 4, 2010Inventors: Shinji Ogino, Keiichi Meguro, Kohei Higaki, Akira Miki
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Patent number: 7512246Abstract: A stereo sounding method which can provide realistic sounds such as stereo sounds for a large number of listeners while reducing the number of speakers. A stereo sounding system is comprised of a plurality of stereo sound sources, and a plurality of speakers. A smaller number of speakers than twice the number of the plurality of stereo sound sources are arranged, and an R-channel output from at least one stereo sound source among the plurality of stereo sound sources and an L-channel output from a stereo sound source other than the at least one stereo sound source are mixed, and the mixing result is output to at least one of the arranged speakers.Type: GrantFiled: April 28, 2004Date of Patent: March 31, 2009Assignee: Yamaha CorporationInventors: Yoshiki Nishitani, Kenichi Miyazawa, Akira Miki, Kenji Ishida
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VOICE-SCRAMBLING-SIGNAL CREATION METHOD AND APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM THEREFOR
Publication number: 20080243492Abstract: Original voice uttered in a first space is acquired via a microphone and a series of digital waveform data of the acquired original voice are obtained. The waveform data are sequentially segmented into plural frames and the waveform data of the individual frames are written into a memory. In parallel with writing, into the memory, of the waveform data, individual ones of the frames already written in the memory are sequentially or randomly selected and read out in a direction opposite to a direction the waveform data of the frame have been written so that a reverse-reproduced voice signal is generated. As the original voice is transmitted, as a leaked voice from the first space to a second space near the first space, a scrambling voice based on the reverse-reproduced voice signal is spatially mixed with the leaked voice in the second space.Type: ApplicationFiled: September 5, 2007Publication date: October 2, 2008Applicant: Yamaha CorporationInventors: Akira Miki, Masato Hata, Atsuko Ito -
Publication number: 20080235008Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.Type: ApplicationFiled: March 19, 2008Publication date: September 25, 2008Applicant: Yamaha CorporationInventors: Atsuko ITO, Yasushi Shimizu, Akira Miki, Masato Hata
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Publication number: 20070203624Abstract: An electronic control unit includes an input interface having multiplexer circuits, each of which circuits is supplied with input signals supplied from an outside of the electronic control unit, and a failsafe processing part that determines whether an abnormality occurs in the input interface by referring to a state of a specific multiplexer circuit that is at least one of the multiple multiplexer circuits when determining that an output signal of the input interface has an abnormal state and executes a failsafe process based on results of determination as to whether an abnormality occurs in the specific multiplexer circuit.Type: ApplicationFiled: February 22, 2007Publication date: August 30, 2007Applicant: FUJITSU TEN LIMITEDInventors: Takaaki Fukushima, Yousuke Matsumoto, Akira Miki