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The present invention relates to a sound quality improvement method for use in a music
reproduction apparatus such as a tape recorder and a speaker system. According to the
conventional method, the level of the frequency band corresponding to a specific music band is
changed to intentionally make the frequency characteristic uneven, thereby controlling the sound
ht in frequency. In such a tone control method, the level can be changed. Since the frequency
band involves a phase change, the time-varying music signal waveform is phase-modulated,
making it difficult to reproduce the original sound. In this case, even if the amount of the
frequency band in which the level is changed is increased, the sound becomes crumpled and
unsharp, so that the sound quality can not be effectively improved in practical terms. The present
invention is intended to provide a sound quality improvement method capable of solving such
problems. The method of the invention will now be described, the method of the invention
comprising an acoustic magnetic component having a core and a coil wound thereon, eg an
inductance, a magnetic head. An aging current sufficient to saturate the core of the magnetic
component magnetically is applied to the coil such as a speaker network, a cartridge, a step-up
transformer, an output capacitor and the like, and this is converged to age the magnetic
component. A current corresponding to a component sound of music (for example, 12 scale) or a
frequency 2n times or 1 / (2n) times a frequency such as 此, or a combined frequency of the
above frequencies, that is, a frequency of chords constituting music (music frequency And the
above-mentioned magnetic component is aged with the frequency signal of the aging current, the
characteristics of the core of the magnetic component in the music band corresponding to the
aging frequency signal. It is designed to be changed to conform to the music signal. The
frequency of the upper H aging current is, for example, a frequency corresponding to 12 kinds of
12 tones interspersed between 4 30h to 4 0+ corresponding to A4 and 8 30.61 Hz and an octave
of 12 tones of e.g. The frequency corresponding to the frequency of 12 degrees which largely
corresponds to the above 12 tones or the frequency which is in the relation of I / (2 "C sound and
the synthetic frequency of the 此 equal frequency and I" I J sum harmonics respectively 1 is
selected. According to the present invention, the magnetic component aged by the aging current
is more responsive to the frequency signal of the aged frequency band, that is, the music signal.
For example, aging with a frequency signal of l 1011z (A 2 豊 か) enriches the low band, and
quenching with a frequency signal of 440 11z (A 4 豊 か) enriches vocals, and further a
frequency signal of 35 20 Hz (A y) There is a characteristic that the overtones of the instrument
become beautiful when aged.
Therefore, the frequency of the Erdingmi flow is better determined depending on the type of
music to be heard. Since the method of the present invention is the same as the conventional
demagnetization method in that the excitation current is converged and demagnetized after the
core of the magnetic component is magnetically saturated, the current frequency of the
demagnetization circuit, that is, the oscillator frequency is practically the same as described
above. It can be implemented by changing it. However, the method of the present invention
differs from a mere demagnetization circuit in that the magnetic component is aged even at a
stage where demagnetization is not required for the magnetic component, such as the force 1 for
the purpose of sound quality improvement. For example, in a tape recorder, it is desirable to age
the magnetic component with a frequency signal selected in accordance with two curves (when
the insect is changed, this aging is obviously a demagnetization operation for erasing the
magnetization) Operation is different. In the method of the present invention, in order to modify
the sound of the music to be reproduced, the acoustic magnetic parts are aged in advance by the
music frequency signal. In this way, it is considered that the magnetic parts have compatibility
with the aged frequency, and the sound quality of the reproduced music can be improved. That
is, the core of the magnetic component is made of a soft magnetic material, for example,
permalloy, ferrite, amorphous alloy, etc., but the permeability, coercivity, hysteresis, etc. of this
material are exchange energy, magnetostatic energy, magnetic anisotropy Forces determined by
magnetic energy, magnetostrictive energy, and thus response to external magnetic fields, eg,
response to external magnetic fields, forces that change in response to S-group aging, and
magnetic marks for the aged frequency even after demagnetization are the core It is believed that
it remains on top of the magnetic domain and domain wall structures that determine the
magnetic properties, and it is assumed that this trace produces compatibility with the aging
frequency. Such improvement of the sound quality is also remarkably recognized by the
following experiment, and it is presumed from the experimental result that the magnetic trace as
described above exists. Experiment Example 1 As a listener, a total of 11 people were selected,
including 4 Auteiomania and 7 sales employees involved in audio equipment sales. As an
experimental apparatus, a PD300 type player, L-550 type blue-main amplifier and JBL-4343 type
speaker according to LUX Co., Ltd. manufactured were prepared, and aging and erasing were
performed using LMC-1 type cartridge. The experiment method first erases with the frequency
current of lK11z to make it listen to the jazz music of the song "Black Coffee", and then it makes
the music frequency of 1046 Hz age (erasing) to make it listen to the music of the same song, I
asked individually the difference between the sound quality of the two.
As a result, regardless of the difference in picture frequency is within 5%, all 11 people confirm
the change in sound quality, and it is said that better sound quality is better when 10 of them age
on music frequency compared with mere erase. I showed the judgment. After that, when the four
music pieces were experimented in the same manner, all the same results were obtained. As a
result of this experiment, it was found that if the magnetic parts are erased and aged at music
frequencies, the sound quality is improved. EXPERIMENTAL EXAMPLE 2 Aging was performed at
a frequency of 110 Hz corresponding to a low-pitched A sound using the same listener as in the
experimental example 1 and experimental equipment f's, and a knee zinc at a frequency of
14080 Hz corresponding to a high-pitched A sound. The case was compared with the case. As a
result of the ninth, all the listeners confirmed the change in sound quality between the two, and
the low range was enhanced when the noise occurred at a frequency of 1 lOUz, and the high
region was enhanced when aged at a frequency of 1408011 z. I showed the judgment. From this
result, it was found that the music frequency used for aging affects the sound quality after aging,
and the sound quality of the aged music frequency band is improved. The circuit shown in FIG. 1
will now be described as a magnetic part (which is configured to age the magnetic head 10, and
the oscillator 11, the attenuator 12 and the amplifier 13 will be described. It consists of The
signal from the aging device is applied to the application point a between the magnetic head 10
and the first stage amplifier 15, which is connected to the reproducing circuit B of the magnetic
head 10 via the aging device Af switch 14. The oscillator 11 is configured to oscillate the music
frequency, and in some cases, is configured to perform a convergence operation by itself. The
attenuator 12 is capable of adjusting the output of the oscillator 11 up to the maximum force)
and is provided for producing a convergence envelope. The amplifier 13 amplifies the output of
the attenuator 12 to a level sufficient to saturate the magnetic head 10 magnetically, and this
output is applied to the coil of the magnetic head 10 through the switch 14. Ru. Since the
embodiment shown in FIG. 1 is such, when the aging apparatus A is driven and the switch 14 is
closed and the output of the aging apparatus A is applied to the application point a of the
reproducing circuit B, The magnetic head 10 and the first stage amplifier 12 can be aged by
closing the switching 18 while the next stage amplifier 16 can also be aged by opening the
muting 18 and closing the muting 19, and further the muting 19 is opened. By doing this, the
magnetic parts connected to the output terminal 17 and subsequent ones can also be knee-jink.
The circuit shown in FIG. 2 is for aging the cartridge 20i, in this case the oscillator 21. By
inserting the shell 2 o of the cartridge 2 ° into the aging device A having the attenuator 22, the
amplifier 23 and the output terminal 24, the shell contact and the output terminal 24 are shorted
and the switch 25 is closed so that the aging signal is obtained. It is arranged to flow to the
cartridge coil 201. The circuit shown in FIG. 3 is for aging a step-up 1-lance 3o, where l ζ is an
aging device A provided with an oscillator 31, an attenuator 32, an amplifier 33, a switch 34 and
an in-device load 35. It is possible to couple the step-up transformer 30 with the output terminal
301 connected to the load 35 and to age the step-up transformer 30. In this embodiment, as
shown by the broken line in FIG. 3, by making the output end 301 of the step-up transformer 30
tangent to the amplifier 30 ', the magnetic parts connected after the step-up transformer 30 are
aged similarly to the step-up transformer. Can do. The circuit shown in FIG. 4A is for aging the
output capacitor and the speaker network 40, and includes an aging device A including an
oscillator 41, an attenuator 42, an amplifier 43, and a switch 44, a front amplifier 45 and an
output amplifier 46. When the aging device A is connected to the amplifier 45, the entire
reproduction circuit Bi is aged when the aging device A is connected to the amplifier 45, and
when the aging device A is connected to the input of the output amplifier 46. In this case, the
output capacitor in the output amplifier 46 and the speaker network 40 are aged. In this
embodiment, when the amplifier 43 has a current margin, the speaker network 40 can be
directly connected to the amplifier 43 for aging. The oscillators 11, 21, 31 and 41 in each of the
above embodiments may generate a frequency signal corresponding to one tuning fork of the
music σ 2 nd scale or its octave sound, or the frequency switching means A desired frequency
signal may be alternatively selected and generated from a large number of frequency signal
powers corresponding to the sound of the 12th scale and the octave sound of the sound such as
a whistle or the like. As the above-mentioned oscillators, those capable of adjusting the output
level-or attenuators, for example, those capable of converging operation performed by a field
effect transistor can be used, and such oscillators capable of converging operation can be used.
You can claim an attenuator. Furthermore, if the above-mentioned oscillators 11, 21, 31, 4 B1,
the output 'Ichihara, or a thick one of the output voltage can be selected, the amplifiers 13, 23,
33, 43 can be distinguished, and the aging apparatus A is independent. If the output end is
manually attached to and detached from the reproducing apparatus B, the switch 14 of the icing
apparatus A can be distinguished.
As shown in FIG. 5, the above-mentioned aging apparatus A connects a large number of
oscillators 51.52... 5n and a mixing amplifier 53 to an example of a mixing circuit connected to
the output end of a low frequency oscillator and this mixing circuit. It may be configured to
include the attenuator 54 and the amplifier 55, and in this case, the outputs of the plurality of
oscillators may be switches 511, 521. Since nl can be supplied to the mixing circuit 53, a desired
frequency signal can be selected and used from a large number of frequency signals that
correspond to the octave tone and the chord l of the 12-tone note and the note, etc. The magnetic
component 5 can be aged by the frequency signal. As described above, since the method of the
present invention can improve the sound quality by aging the magnetic parts by the music
frequency signal, the sound quality can be improved better as compared with the conventional
tone control method, and the aging method is magnetic. Since the magnetic saturation and
convergence demagnetization of the parts are performed, there is also an effect that the
conventional demagnetizer can be utilized.
Brief description of the drawings
1 to 5 are each a circuit diagram showing an apparatus for carrying out the method of the
present invention.
In the figure, 11.21, 21, 41, 51, 52, 5n denote oscillators, 12, 22, 32, 42 denote people
attenuators, 1, 0, 20, 30, 40, 50 denote magnetic parts. Patent applicant Lax Co., Ltd. Agent
Matsuda Ishii part Spontaneous procedure Ura Tadashi August 30, 1983 Secretary General of
Patent Office Kazuto Wakasugi Hall 1, Indication of the case 7 o'clock 1958 Application No. 142,
187 2. Invention名称 Name Music 生生 装置 Equipment sound quality improvement method 3,
relationship with the case of correction 出 J people Toyopuka / Shi / Senrinishimate residence 1
person 1 name 1 oil Nishiri Nishimachi Toyonaka City Osaka Prefecture Name (name) (1; formula
company 5 date of correction instruction "16, number 7 of invention to be increased by
correction, target of correction 41i'l of" detailed description of the invention "in the present
specification and the present drawing Figure 1; Contents As shown in the attached sheet 1, in this
specification, page 9, the bottom line, "Line 2". Correct "to become". 2. Add the symbol A to the
figure 1 in the drawing of this application, and add a leader to the symbol B.
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