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JPS56126398

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DESCRIPTION JPS56126398
Loudspeaker Device, Speaker Device A speaker device comprising a speaker which operates by
replacing the air in the cavity in which the voice coil of the electrodynamic speaker is suspended
and the air connected to it with helium gas or hydrogen gas A speaker device characterized in
that it compensates for a change in frequency characteristics caused by the gas replacement of
the speaker (a constant of the speaker network can be changed.
2, the scope of claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device,
and more particularly to a speaker device K + fl including a speaker for radiating heat generated
by a voice coil of an electrodynamic speaker through helium gas or hydrogen gas. Large output,
the speaker is required to ... Ifai, for radiating heat generated when the through t the voice coil of
the electrodynamic loudspeaker, the gap Oyo ? it Ren?Ru cavity voice coil is suspended It is
considered to replace the air inside with helium gas or hydrogen gas which has a better heat
conductivity than air. By the way, in such a speaker (d, the stiffness S of the cavity in which the
voice coil is suspended and the cavity connected to it. Where: ? is the density of the gas, C is the
velocity of sound in the gas, S is the area of the diaphragm of the loudspeaker, ? is the magnetic
gap of the loudspeaker and the air gap on the back of the peristaltic plate It is a series of hollow
bonds. In the formula (1), the value ?c2 of the right-hand numerator 1-1. Whether the gas is
helium gas or hydrogen gas or air I (more different, hence the stiffness S of the cavity. Have
different values 1 (one) depending on the type of gas. And if the stiffness of the cavity is
different. The frequency characteristics of the speakers are generally different. There is also a
method of using the velocity of the speaker I as the use of the speed, the value of the cavity
stiffness directly affects the frequency characteristics of the speaker, EndPage: 1. However, it is
desirable that the method be used so as to always obtain a desired frequency custom order, and
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the development of technology relating to this is desired. An object of the present invention is to
provide a speaker device in which a desired frequency custom-design can be obtained even if the
values of the stiffness of the speaker cavity are different in accordance with the above-mentioned
demand for technical development. To achieve this goal. The present invention is directed to
compensating for changes in cavity stiffness values in electrodynamic loudspeakers by varying
the constant of the loudspeaker network. One example of the present invention and a scare
example will be specifically described using the following one drawing. First, in FIG. 1, the
transfer function T from the input terminal of the speaker to one point of the radiated sound field
of the speaker can be expressed by the following equation (2) ", that is, T is 1 / (1 + i / The
characteristic 1 / (1 + 1 / jy), which is equal to the square of jy), is 1. For example, it can be
realized by the circuit of FIG. In FIG. 2, 22-. Reference numeral 23 denotes an input terminal 221
whose impedance is 1 / J?C21.
Reference numeral 20 denotes a register whose resistance value is R2o. Now, if C2, = 1 / ?1R20,
the transfer function T1 of this circuit is as shown by the linear equation (3). n "... (y) where y-?
/ ? 1 Next, let f be the crossover frequency that should be the lower limit of the speaker's
reception band, and let the low-pass transfer function T of the speaker itself be a single
resonance curve If I can think of J. Here, Q. , Is the lowest degree of resonance sharpness. yo4 is
a ratio of ? / ?, and ? is 010 which is the lowest resonance angular frequency. y,> 1 J here 1
equivalent resonance sharpness Q. , 'And Qo. Q equivalently. If you can reduce it to one. It can be
considered that To, a frequency of yo, = 1 / Qo1 'is drawn in the same curve as center 1 1
equation 1 / (10-). ????? T-----... (7) j1 + -E-7 where + Qo4 'is less than or equal to 115-1/4,
and particularly preferred is a car that is 1/2 or more E Depending on the application, 'is
generally undesirable. In any case, it becomes j from the equation (3) and the equation (7), and
therefore, it can be regarded that n, 011 is approximately equal to T, -T. J, YQo, "A method to
make equivalent equivalently by ringing a speaker with a lightning suppression circuit"] (A for
example 1 C, Technical Report of the Institute of Electronics and Communication Engineers Vo
1.75 ░ No, 52. EA 75-17. From the above, if the frequency custom-made around the lowest
resonant angular wave number of the speaker 1 can be a single resonance curve and a single -t,
=, then the term of entry to the speaker 1 is EndPage: 2 minimum By electrically suppressing the
resonance frequency, it is possible to make the value of the equivalent resonance sharpening
equivalent to one. The elements are the equivalent resistor 3 and the capacitor 4 shown in FIG. 1,
which are connected in parallel with each other and are connected in series with the speaker 1.
In FIG. 1, assuming that the resistance value of one equivalent register is R3. Here, Ro is a
resistance value when the impedance when looking to the right from the boundary a9 is a pure
resistance, f is the lowest resonance frequency of one speaker 1, and Q is the lowest S-sharpness
of the speaker 1J. In addition, the ratio J of f, / f (d, preferably 4 times or more should be
selected. ??? ??????????????????????? Likewise, if the capacitance
of capacitor 4 ? c 4. Here, since the impedance looking to the right from the boundary 10 is not
pure resistance except in the case of a specific frequency, lri, an inductor to make the inductance
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looking to the right from the boundary 11 be a pure resistance R6 Let the inductance of 5 be R5.
R5-C4 и R, 2 иииииииииииииииииииииииииииииииииииииии Assuming that the resistance value of the 9 equivalent register 6
is R6. ????????????????????????? ??????? ????????
????????????????? Choose. As described above, R, R2, C4, R5, R6 and C7. All
f. , And Q. Is a function of And their possible directness, if not unlimited, is each and every one
and only one (eight. Therefore, the value of the cavity stiffness Sc differs depending on the type
of air in the air and sinus. f and Q. Even if the value of, is different, it is possible to select the JR5,
R2, C4, R5, R6, t6 and C,) values according to each. For example, if the air in the cavity is
replaced with helium gas, the stiffness id of the cavity will increase, so "in the case of helium gas
will be a better dog. However, Q, too, the condition other than f is not good (if it is 1101, it may
be considered to be proportional to f, 10) "He also has more dogs in the case of helium gas. The
value of each element when the air in the cavity is replaced with helium gas, that is, the inductor
/ sector L2 'of the inductor 2', the resistance R5 'of the resistor 6', the capacitance C of the
capacitor 4 ', and the inductor 5't7) Inductance L ', resistance of resistor 6' @ Capacitance 7 'of
capacitor 6' is both described above. Calculated according to R, C4, R5, R6 and C7, the elements
are connected as shown in FIG. 1, and the gas in the cavity is changed from air to helium gas and
at the same time the contact 16 of the switch 14 Is switched to the contact 16 ', and the contact
17 of the switch 15 is switched 14 to the contact 17'. In the above embodiment, separate
elements are used when the gas in the i1 cavity is air and helium gas, but some elements may be
shared and elements in shortage may be added (also (D, a tap may be provided, and it may be
switched. In conjunction with the opening and closing of the valve of the gas cylinder, it may be
switched automatically (when the circuit is switched with helium gas or hydrogen gas (1 It may
be. As described above, according to the present invention ((accordingly, the heat generated by
the voice coil of the electrodynamic speaker EndPage: 3) (in the speaker Wi + including the
speaker for radiating heat through hydrogen gas, the speaker Since the values of the elements of
the speaker network can be switched depending on the type of the gas (in the cavity connected
to the voice coil cavity), if the input to the voice coil is small, In the case where air is put into the
cavity to operate, and a large input is applied to the voice coil, the gas in the cavity should be put
away with helium gas etc. and released. It can be regarded as having a transfer function; a viable
and economical loudspeaker device can be obtained.
4. Brief Description of the Drawings FIG. 1 is a circuit diagram showing switching of a speaker
network of an embodiment of the speaker device according to the present invention. FIG. 2 is a
basic circuit diagram of the low-pass blockage for explaining the well water characteristic of FIG.
. Explanation of symbols Tos beka 2, 2 'и inductor 5.5' и и и equivalent resistor 4.4 'capacitor 5.5' и и
inductor 6, 6 '... equivalent lenser 7.7 и capacitor 8 и capacity 14 .15 Switch 20 Resistor 21
Captive Agent Attorney Junnosuke Nakamura EndPage: ?
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