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Dive into the research topics where Masao Noro is active.

Publication


Featured researches published by Masao Noro.


Journal of the Acoustical Society of America | 2008

Device for driving vibration source

Masao Noro; Takahiro Tanaka; Nobukazu Toba; Kiyoshi Yamaki

An excitation device vibration source comprising: a source (10) for generating sound musical tone signals; a sequencer (40) for driving and controlling the sound source (10) based on sequence data, namely music data; means (22) for driving a source (24, 26) of vibration; and a switching means (42) to turn on or off a signal supplied to the excitation means (22) under control of the sequencer (40), in which the sequencer (40) is adapted to control the switching means (42 ) based on timing data included in the sequence data.


Journal of the Acoustical Society of America | 1994

Acoustic apparatus and driving apparatus constituting the same

Kenji Yokoyama; Masao Noro

An acoustic apparatus comprises a cabinet, and a loudspeaker unit and a driving apparatus disposed in the cabinet. The acoustic apparatus is driven by an external power amplifier which normally constant-voltage-drives a conventional loudspeaker. The driving apparatus has a power amplifier circuit and a transfer function control circuit, and drives the loudspeaker unit in cooperation with the external power amplifier. The driving apparatus generates an electric energy corresponding to an increase in energy from that which is required in a normal constant-voltage-driving, the increase being produced by an operation of the transfer function control circuit, and the generated energy is inputted to the loudspeaker unit. By means of the above, when the acoustic apparatus is driven by the external power amplifier, an internal resistance of the loudspeaker unit is substantially cancelled or reduced, and an improvement of the electro-acoustic transducing characteristics of the loudspeaker unit or a loudspeaker system is achieved.


Journal of the Acoustical Society of America | 2000

Sound field expanding apparatus with improved tone control system

Tatsuya Kishii; Masao Noro

A sound field processor having amplitude/phase conversion circuits for left and right channels of a stereophonic signal. The amplitude/phase conversion circuits for left and right channels have substantially the same circuit structure. Each of the amplitude/phase conversion circuits has an inversion amplifier, an amplitude/phase characteristic changing circuit that changes amplitude and phase characteristics of an output from the inversion amplifier, and a feedback device that add outputs from the amplitude/phase characteristic changing circuit and outputs from the inversion amplifier to an input signal to generate a sum signal and feed back the sum signal to the inversion amplifier. An output from the inversion amplifier for the left channel and an output from the amplitude/phase characteristic changing circuit for the right channel are added by a first adder device. An output from the inversion amplifier for the right channel and an output from the amplitude/phase characteristic changing circuit for the left channel are added by a second adder device. An output from the amplitude/phase characteristic changing circuit is fed back through a feedback path between an output and an input of the amplitude/phase characteristic changing circuit. A D/A converter is interposed in the feedback path to adjust the level of the feedback signal to perform bass control.


Archive | 2005

Switching power device

Yuzo Ishigaki; Masao Noro


Archive | 1998

CMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converter

Masao Noro; Yusuke Yamamoto; Toshio Maejima


Archive | 2003

Capacitor-input positive and negative power supply circuit

Masao Noro


Journal of the Acoustical Society of America | 2008

Vibration source driving device

Masao Noro; Takahiro Tanaka; Nobukazu Toba; Kiyoshi Yamaki


Archive | 2003

Triangular wave generating circuit used in a Class-D amplifier

Nobuaki Tsuji; Masao Noro


Archive | 2004

Array speaker system

Akira Usui; Masao Noro


Archive | 2000

A/D conversion apparatus

Masao Noro; Akira Sogo; Ryo Kamiya

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