Tokyo, Japan
Tokyo, Japan

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Tomita Y.,Foster Electrical Co. | Mitsukura Y.,Foster Electrical Co.
2013 6th International Conference on Human System Interactions, HSI 2013 | Year: 2013

Although brain computer interfaces (BCI) based on electroencephalographic (EEG) signals have been studied increasingly over decades, their performance is still limited in two main aspects. First, the shorter the EEG epochs, the more difficult the detection of a BCI command. Second, BCI commands are often misclassified while the subject is not performing any tasks by not focusing on a command (offset condition) because the EEG characteristics of the offset condition are not unique. In order to circumvent these limitations, the hemodynamic fluctuations in the brain during stimulation with steady-state visual evoked potentials (SSVEP) were measured using near infrared spectroscopy (NIRS) simultaneously with EEG. The offset condition is distinguished from the onset condition (focusing on a command) with extracted NIRS features through the design of low-pass filter. BCI command estimates were based on EEG SSVEP response. Simultaneous evaluation of EEG and NIRS was shown to improve the SSVEP classification, notably including the offset condition as an independent class, using a novel offset condition estimation approach. For 13 subjects, wrong classification for 9 classes with inclusion of offset condition were decreased. This proposed bimodal approach including the offset condition detection may render current BCI systems more reliable. © 2013 IEEE.


Tomita Y.,Foster Electrical Co.
IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society | Year: 2015

In this paper, I propose a novel binaural speech enhancement algorithm, called an asynchronous component cancellation Wiener filter (ACC-WF). It cancels not only uncorrelated noise components but also asynchronous noise components, by simply introducing a weight function in the calculation process of a binaural Wiener filter. This weight function is calculated from the phase of the cross-spectrum of observed signals at the left/right ears. In this method, a speech source at the front of a head is regarded as a synchronous signal source, whereas noise sources at different azimuth angles of the speech source are regarded as asynchronous signal sources. In accordance with the weight function, only the asynchronous components are removed. In experiments using speech signals, ACC-WF worked effectively for speech enhancement. The simplicity of the procedure and the effectiveness of ACC-WF may make current binaural speech enhancement systems faster and more reliable. © 2015 IEEE.


Patent
Foster Electrical Co. | Date: 2011-06-01

An earphone that can be used with its using mode selected, to be excellent in the handiness, by optionally changing the cord from its normal hang down state easily to an ear hanging state, or oppositely from the ear hanging state to the hang down state, to meet the users using state or taste, is provided. The earphone has a front housing 2 provided therein with a driver unit 8, an ear pad 3 covering as fitted to front outer peripheral part of said front housing 2, a rear housing 4 provided on the back of said front housing 2, a bushing 6 provided to said rear housing 4 and having at lower end part a cord lead-out section 6a, and a cord 9 led out of said cord lead-out section 6a, wherein the bushing 6 is rotatable.


Patent
FOSTER Electrical CO. | Date: 2015-02-24

A cable switch comprising a first base member of a band shape provided with a conductor on an inner surface and a second base member facing the first base member, and including a flat positive electrode and a negative electrode, the positive electrode being provided on one side of an inner surface thereof and the negative electrode being provided on another side of the inner surface, a gap being formed between the positive electrode and the negative electrode for separating and insulating the positive electrode and the negative electrode from each other.


Trademark
FOSTER Electrical CO. | Date: 2011-04-26

Headphones and their parts and accessories; ear-sets and headsets for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; electric wires and cables; cord management system for rewinding cords and cables; straps and neck straps for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; cases for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; protective films for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and personal listening devices and their parts and accessories; clips for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; ear-caps for headphones and headsets; earphones and their parts and accessories; decorative charms and covers for earphones, headphones and headsets with imitation gems; clips for preventing cords from dangling for headphones and headsets; decorative charms and covers for headphones and headsets; apparatus for recording, transmission and reproduction of sounds and images and their parts and accessories; imitation gems for surface decoration of cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; imitation gems for surface decoration of portable listening devices for personal use. Imitation gems for general decorative purposes. [ Decorative stickers for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; decorative stickers for portable telecommunication devices, namely, for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories; decorative stickers for portable sound-reproducing devices for personal use, namely, for cellular or mobile phones, audio players/recorders which use integrated circuits as recording media, computers and portable listening devices and their parts and accessories ].


Trademark
FOSTER Electrical CO. | Date: 2016-05-24

Mobile telephones; loudspeakers; headphones; headsets; electric actuators; electroacoustic transducers; controllers for computer games; controllers for virtual reality; goggles for virtual reality; virtual reality headsets; touch pad; displays for computers; mouse; keyboards; portable terminal devices; portable audio players; handles for remote control; operating handles for simulators; helmets for virtual reality; wearable information terminal.


Trademark
Foster Electrical Co. | Date: 2012-09-04

Electric acoustic and communication instruments and equipment, namely, tape recorders, tape reproducers, audio mixers, line mixers, meter bridges, remote control switches, audio signal processing equipment, namely, digital delay units, graphic equalizers and noise reduction units, speaker systems, loud speakers, microphones, microphone stands, amplifiers, stereo receivers, radio tuners, head-phones and structural parts thereof; analog audio recorders, analog audio reproducers, digital audio recorders, digital audio reproducers, analog audio mixers, digital audio mixers, computer audio interface and remote controllers, network audio transmitters, network audio receivers, network audio interface and switch boxes, audio signal processing equipment, namely, digital delay units, graphic equalizers and noise reduction units, and structural parts thereof, audio signal converters featuring AD/DA conversion, and audio signal cables.


Trademark
FOSTER Electrical CO. | Date: 2013-12-10

LOUDSPEAKER SYSTEMS; LOUDSPEAKERS; WOOFERS; TELEVISIONS; TELEVISION RECEIVERS; LCD TELEVISIONS; AUDIO APPARATUS FOR CARS, NAMELY, CAR STEREOS; SOUND AND IMAGE RECORDING APPARATUS; SOUND AND IMAGE REPRODUCTION APPARATUS; TELECOMMUNICATION MACHINES, APPARATUS AND THEIR STRUCTURAL PARTS, NAMELY, CABINETS FOR LOUDSPEAKERS AND ACOUSTIC DIAPHRAGMS FOR LOUDSPEAKERS; APPARATUS FOR RECORDING TRANSMISSION AND REPRODUCTION OF SOUND AND IMAGES.


Trademark
FOSTER Electrical CO. | Date: 2016-05-24

Mobile telephones; loudspeakers; headphones; headsets; electric actuators; electroacoustic transducers; controllers for computer games; controllers for virtual reality; goggles for virtual reality; virtual reality headsets; touch pad; displays for computers; mouse; keyboards; portable terminal devices; portable audio players; handles for remote control; operating handles for simulators; helmets for virtual reality; wearable information terminal.


Trademark
FOSTER Electrical CO. | Date: 2011-01-25

Electro-acoustic devices and their parts, namely, loudspeakers; loudspeaker systems primarily consisting of audio speakers; head-phones; headsets for use with computers; headsets for use with telephones and cell phones; headsets for use with portable audio players; microphones; diaphragms in the nature of acoustic membranes for speakers, microphones and electro-acoustic devices; portable digital audio players for playing music; sound or image recording apparatus; sound or image reproduction apparatus.

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