Sony Group Corporation

Toyo Ink Manufacturing Company

Toyo Ink Mfg. Co., Ltd.

Yuuji Hirasawa

Yohei Sakuraba

Atsushi Masuda

Takashi Kamikubo

Akimitsu Mochizuki

Hiromi Iizuka

Toru Omura

Junsei Abe

Eiji Chihara

To provide an audio processing device including a configuration in which a different microphone is used for generation of directivity depending on a frequency band.

Audio processing device having microphones arranged with different spacing and diameters

Microphone

A colorless or only slightly colored pigment dispersing agent which is feasible as a pigment dispersing agent for pigments having various hues and has the general formula (1), ##STR1## wherein R.sub.1, R.sub.2, X.sub.1, Y.sub.1, Y.sub.2, k and h are as defined in claim 1.

Pigment dispersing agent and pigment composition containing the same

A monoazo lake pigment and a process for its production; the monoazo lake pigment excellent in clearness, transparency, gloss and tinting strength is obtained by coupling a diazo component which is an aromatic amine having a sulfonic acid group with a coupler component which contains .beta.-naphthol or .beta.-oxynaphthoic acid and adding a laking agent during or after the coupling reaction, the coupler component further containing 0.1 to 30 mol %, based the coupler component, of a compound of the following formula, ##STR1## wherein n=1 or 2.

Monoazo lake pigment suitable for use in printing ink and process for

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Tokyo, Japan

Yuuji Hirasawa