Oki Electric Industry Co., Ltd.

Fujitsu Component Limited

Mayekawa Mfg. Co., Ltd.

Seiko Instruments & Electronics Ltd.

Canon Kabushiki Kaisha

Katsuyuki Takahashi

Kiyoshi Tanaka

Toshiro Hattori

Satoshi Moriyama

Shigeki Nakayama

Daishi Kitajima

Ryuji Sasaki

Yoshiyuki Kobayashi

Akira Matsui

Satoshi Matsumoto

Masashi Takada

Masaaki Kamiya

Yoshinori Kurata

Kazuaki Miyanaga

Natsumi Sakai

Hiroaki Kohinata

Koyuru Kobayashi

Harumi Sato

Masahide Mochizuki

Yukihiro Imura

An electromagnetic relay including a housing, a cover, an adhesive which is interposed between a side part of the housing and an inner surface of the cover and which secures the housing and the cover, and a projection which is formed in at least one of the side part and the inner surface. The adhesive is filled in a gap between the side part and the inner surface.

Electromagnetic relay

An electromagnetic relay including: a base unit that includes a slit having a first wall part and a second wall part, and a first projection projecting from the first wall part of the slit; a terminal that is press-fitted into the slit, and includes a second projection at a position opposite to the first projection; and a preventer that prevents deviation of the second projection against the first projection when the terminal is press-fitted into the slit.

An electromagnetic relay includes: an electromagnet; a twin contact set that includes first twin contacts provided on a first movable spring, and second twin contacts that are provided on a first fixed contact plate and disposed opposite to the first twin contacts; a single contact set that includes a first single contact provided on a second movable spring, and a second single contact that is provided on a second fixed contact plate and disposed opposite to the first single contact; and a card that moves in response to excitation or non-excitation of the electromagnet, and moves the first and the second movable springs simultaneously with the movement of the card.

An electromagnetic relay includes a contact including a movable spring having a base end fixed to a bottom of a housing and a tip end provided with a movable contact, and a fixed spring having a base end fixed to the bottom of the housing and a tip end provided with a fixed contact. The movable contact is provided opposite to the fixed contact so as to come in contact with the fixed contact or move away therefrom. The housing has a protrusion protruding toward a side of the fixed contact opposite to a side facing the movable contact.

The signal processor suppresses noise components contained in input sound signals by iterative spectral subtraction. The processor derives coherence from first and second directional signals having directivity characteristics on the basis of a pair of input sound signals, and controls the times of iteration of spectral subtraction on the basis of the coherence, thereby suppressing the noise components contained in the input sound signals.

Signal processor and method therefor

A signal processor is configured to suppress a noise component contained in an input voice signal by means of coherence filtering. The processor includes an iterative coherence filtering function for repeatedly conducting the coherence filtering on a signal, which has been subjected to the coherence filtering and then input to the processor again as input signal, and performs the iteration processing on the signal obtained by the coherence filtering until a condition for terminating the iteration is satisfied, thereby preventing musical noise from generating while a noise component is suppressed.

The present invention relates to a sound emitting and collecting apparatus including a sound collecting portion that captures surrounding sound using two microphones, and a sound emitting portion that emits sound from at least one speaker. The apparatus includes a sound source separating portion that extracts a target sound from a sound source in a predetermined direction, based on an input sound signal obtained by capturing surrounding sound using the two microphones, and an emission non-target sound removing portion that removes a non-target sound that is emitted from the speaker and captured by each of the microphones, based on sound source data for the sound emitting portion. The emission non-target sound removing portion is provided on a path that reaches the sound source separating portion. The emission non-target sound removing portion has a structure similar to an acoustic echo canceller, for example.

Sound emitting and collecting apparatus, sound source separating unit and  computer-readable medium having sound source separation program

A voice signal processor detects background noise sections to reflect characteristics of the background noise on the Wiener filter coefficient to be used for suppressing noise components of input voice signals. In the voice signal processor, directivity signal generators form directivity signals having a directivity pattern. The directivity signals are used by a coherence calculator to obtain coherence, which is in turn used by a targeted voice section detector to detect a targeted voice section. A background noise section detector detects background noise sections containing no voice signal. When a background noise section is detected, a WF adapter uses characteristics of background noise in the detected temporal section to calculate a new WF coefficient.

Apparatus and method for suppressing noise from voice signal by adaptively updating Wiener filter coefficient by means of coherence

The invention provides an audio signal processing device capable of improving sound quality by causing a voice switch to operate appropriately. Delay-subtraction processing is performed on an input signal to form a first and second directional signal with nulls in a first and second specific direction, respectively, and a coherence is obtained using the two directional signals. The coherence is then compared to a determination threshold value to determine whether the input audio signal is a target-sound segment arriving from a target-direction, or a non-target-sound segment other than the target-sound segment. A gain is set according to the determination result, and any non-target-sound is attenuated by multiplying the input signal by the gain. The determination threshold value is controlled based on an average value of coherence in interfering-sound segments.

Audio signal processor, method, and program for suppressing noise components from input audio signals

There is provided a sound collecting device, including: an orientation direction forming section that forms an orientation direction of a microphone array; and a control section that, when a characteristic in a frequency band of a synthesized signal obtained by synthesizing the acoustic signals corresponds to a characteristic of an acoustic signal corresponding to a sound other than a target sound, controls the orientation direction forming section such that an orientation direction that is a direction that is different than an orientation direction of the microphone array at a present point in time is formed, and, when the characteristic in the frequency band of the synthesized signal does not correspond to a characteristic of an acoustic signal corresponding to a sound other than the target sound, controls the orientation direction forming section such that the orientation direction of the microphone array is maintained.

Sound collecting device, acoustic communication system, and computer-readable storage medium

In a telephone device, a near-end signal processor delays each input near-end signal delivered from the respective microphones by a delay amount, and synthesizes the input near-end signals into a synthesized near-end signal. In an echo canceller, mounted on board the telephone device, a far-end signal is delayed by the same delay amounts as used in the near-end signal processor to form plural delayed far-end signals, which are synthesized into a synthesized far-end signal, with which the echo component in the synthesized near-end signal will be suppressed.

Echo canceller operative in response to fluctuation on echo path

An automatic gain control apparatus can prevent jumps in the gain coefficient when the gain coefficient is altered, due to a sharp change in the level of the received signal before and after the alteration. The apparatus includes a mean square circuit for processing the received signal, a gain coefficient generating circuit for generating a gain coefficient, a decision circuit for deciding whether the received level of the received signal has changed, and a control circuit for, when a change in the received level of the received signal is detected, determining a number of mean square values and a generating interval. The apparatus further includes a gain coefficient linear smoother for altering the gain coefficient over an interval, and a multiplier for multiplying the received signal by the gain coefficient obtained from the gain coefficient linear smoother.

Automatic gain control apparatus

A screw compressor is equipped with a manually operated internal volume ratio adjusting slide valve and capacity adjusting slide valve. The compressor is simple in construction, can be produced with low cost, can accommodate decrease in suction pressure, for example, in an aged gas well, and can be operated without an electric power source for controlling the operation thereof. Also a combined screw compressor unit consisting of a plurality of screw compressors for producing high discharge pressure is provided which can accommodate high suction pressure in order not to overload the higher pressure compressor or compressors with the efficiency of the unit kept as high as possible by including at least a screw compressor according to the present invention in the unit.

Screw compressor capable of manually adjusting both internal volume ratio and capacity and combined screw compressor unit accommodating variation in suction or discharge pressure

A multi-stage screw compressor unit and method of operation thereof are provided, which enable operation with high efficiency always even when suction or discharge pressure fluctuates widely, the compressor unit comprising a combination of a compression stage provided with an unloader slide valve and that provided with an internal volume ratio control valve, or a combination of compression stage provided with an internal volume control valve and that of fixed internal volume ratio, or a combination of compression stages each provided with an internal volume control valve.

Growing community of inventors

Tokyo, Japan

Katsuyuki Takahashi