Sony Corporation

Kazuhisa Kito

Naotaka Tsunoda

Kensaku Abe

Kenji Ide

Kohei Asada

Nobuo Kobayashi

Akihiko Hosaka

Keiko Yabuki

Noriyuki Ozawa

Hirofumi Nishimoto

Yoshihiro Sugimoto

There is provided an earphone device of an ear-hole insertion type having a noise cancelling function, the earphone device including a left channel housing unit that accommodates a left channel driver unit outputting a left channel sound; and a right channel housing unit that accommodates a right channel driver unit outputting a right channel sound. A microphone for noise cancelling and a battery are accommodated in each of the left and right channel housing units.

Earphone device

A sound reproducing device includes: a plug section configured to receive input of L-channel and R-channel audio signals; an L-channel housing section including at least an L-channel driver unit configured to produce sound on the basis of the L-channel audio signal, an L-channel microphone configured to collect external sound, and an L-channel microcomputer configured to perform setting control on noise-canceling processing on the basis of a collected sound signal of the microphone; an R-channel housing section including a same corresponding configuration as those of the L-channel housing section; and an in-cord housing section formed so as to be inserted in a wiring cord for supplying the signals inputted from the plug section to the L-channel and the R-channel housing sections, wherein the in-cord housing section is provided with a communication terminal for allowing data communication between the L-channel microcomputer and the R-channel microcomputer, and an external apparatus.

Sound reproducing device

A headphone sectionhaving microphone elementsL,R for detecting a sound around the user and signal acoustic transducing elementsL,R which function as a sound source for canceling the sound around the user housed in the headphone boxesL,R and a control circuit sectionthat includes a noise canceling headphone together with the headphone sectionare separately configured. The control circuit sectionis adjusted in such a manner that variation can be reduced and predetermined frequency characteristics and gain characteristics are achieved at a predetermined frequency. To the headphone section, gain adjusting sectionsL,R are equipped.

Acoustic apparatus and headphone

The signal source of the reference frequency of a PLL,is composed of a VCO,A VCO,is provided. A first audio signal (L&plus;R) is supplied to the VCO,so as to control its oscillation frequency f,. A second audio signal (L&minus;R) is supplied to the VCO,so that an FM signal S,is formed whose occupied frequency band is outside the band of the first audio signal (L&plus;R). This FM signal S,is supplied to an adder,hereby added to a phase comparison output that is supplied to a VCO,from a low-pass filter, and then supplied to the VCO

FM modulator

An electro-acoustic transducer having a main body portion 4 housing at least a speaker unit, a pinna inserting portion 5 protruding from the main body portion and adapted for being inserted into a pinna of a user, an elastically deformable auditory canal fitting portion 12, 51 provided on the outer periphery of the pinna inserting portion and an insertion control portion 46, 52 for controlling an insertion position of the auditory canal fitting portion 12, 51 into the auditory canal. By inserting the pinna inserting portion 5 into the pinna, the auditory canal fitting portion 12, 51 is deformed to conform to the shape of the auditory canal and fitted in the auditory canal in this state for hermetically sealing the auditory canal. The insertion control portion 46, 52 is retained by a portion of the pinna for controlling the inserting position of the auditory canal fitting portion 12, 51 in the auditory canal. The electro-acoustic transducer may be attached in a stable state with optimum attachment feeling for any user to enable the playback sound to be heard with satisfactory acoustic characteristics.

Growing community of inventors

Kanagawa, Japan

Kazuhisa Kito