вход по аккаунту


код для вставкиСкачать
Patent Translate
Powered by EPO and Google
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
■ Sound reproduction device ■ Japanese Patent Application No. 45-99966 [Phase] Application
No. 45 (1970) November 13 @ Inventor Yajima Mikio Koriyama City Sakaemachi 2 25%
Mitsubishi Electric stock% formula% @ Applicant Mitsubishi Electric Corporation Tokyo Chiyodaku Marunouchi 2 of 2 [3] Agent Attorney Kanno Shin-
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a drive system of a
conventional ordinary speaker, and FIG. 2 is a cross-sectional view of a drive system of a speaker
used in the sound reproduction apparatus of the present invention. FIG. 3 is a characteristic
curve diagram showing measured values of response when two identical signals are added in
phase and in phase to a speaker used in the device of the present invention. FIG. 4 is a block
diagram of the sound reproducing apparatus of the present invention.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound
reproducing apparatus that can easily compensate for the shortcoming of 2-channel stereo with
improved speakers and obtain better presence. In the 2-channel stereo, linear sound broadening
had a dramatic effect on the eyebrows compared to monaural, but it was not possible to obtain a
three-dimensional, yet effect that surrounded by sound. Therefore, by utilizing the components of
the sum and difference of the conventional left and right channels and appropriately arranging
the speakers and combining these components in space, an effect that produces a sense of
lifelikeness not yet obtained is obtained. Be In the past, to create the sum and difference
components of the left and right channels needed to obtain this special effect, I) IJ Lax's path etc.
was used. Has the disadvantage of being complicated and cost-up. [111111] The present
invention aims at eliminating the above-mentioned drawbacks, and in one circuit (in a simple and
high-fidelity manner using a speaker having two independent driving voice coils). It is intended
to pick out the signal sound of the sum and difference of one signal. The illustrated embodiment
will be described below. That is, in FIGS. 1 and 2, 1 is a yoke, 2 is a pole piece, 3 is a bobbin, and
4 is a voice coil. As shown in FIG. 1, the conventional speaker has one voice coil consisting of one
conducting wire, and when the current and the direction of the flux are in the relation as shown,
the direction of the arrow is indicated by Fleming's left hand rule. Force F acts. Therefore, it
vibrates according to the change of the current which flows into a coil. On the other hand, as in
the example shown in FIG. 2, the speaker has two independent driving voice coils 5 and 6 used in
the sound reproducing apparatus of the present invention. Therefore, when the same signal is
applied in the opposite phase, the forces acting on the voice coil are simultaneously applied up
and down and eventually they cancel each other and stop. Conversely, when the same signal is
applied in phase to the two voice coils, it works equivalent to the conventional speaker as shown
in FIG. FIG. 3 shows measured values of responses when the same signal sound is added to the
in-phase and anti-phase to the speaker according to the present invention. When added to the
same phase, it has nothing to do with a conventional speaker having the same magnetic circuit
and vibration system (a completely identical response is obtained. Also, when added to the
reverse phase, the voice coil should ideally stand still, but it is not completely canceled out due to
the influence of the inhomogeneity of the magnetic field and the inhomogeneity of the winding of
the voice coil.
However, a level difference of 45 dB or more is ensured when the in-phase and anti-phase
connections are made9, and an effect comparable to that of the conventional one obtained by a
matrix circuit or the like can be obtained. FIG. 4 shows the sound of the present invention
designed to reproduce a three-dimensional sense of presence using the speaker of FIG. 2
[111111] EndPage: 1-12 is positioned behind the listener to make the reverberation sound
Ideally used for regeneration. [1111111 [phase] cited document JP-B-38-23506 [111111]
EndPage: 2
Пожаловаться на содержимое документа