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The present invention relates to a high fidelity (J (IFI)) speaker device that detects the speaker
vibration directly to the speaker 鋏 I and returns negatively. In the past, it was considered
difficult to quickly detect the speaker without vibration and total distortion I. The present
invention provides a special case in which vibration is effectively detected by a magnetoresistive
element or a Hall element without affecting the operation of a speaker and the output is returned
as necessary to improve the performance. In FIG. 1, 1 is a speaker cone, 2 is a drive coil, 3.4 is a
field, 5 is a damper, 6 is a surrounding material, and 7 is a frame. A la'A resistance element or a
Hall element 8 is attached to the plate 40 of the cone base and vibrates with the cone. A magnet
11 generates a magnetic field 05 by the yokes 5 and 10. For example, 0 cone which 11 is fixed at
3 by support i12.13, S! [1] Then, the magnetic field intersecting 8 changes resistance, and thus,
for example, constant ta, tl-flowing turtle pressure is obtained as an output. If the shapes of the
yokes 5, 10 and 8 are made appropriate, it is possible to generate a pressure of 10 or 1 so that
the resistance changes to a-shape with respect to 4-8 of 8's. 8 may also be attached to the cone
line like a cocoon. Same, wearing field 9. The output from father 51, which leads by lO. 14 is a
fixture. Similarly, as in 8't, the magnetosensitive element may be attached to the base of the cone,
and to the 15 front side of the cone as wing '. Do not put on each one corresponding. FIG. 2 (a)
shows the principle of the magnetoresistive element, and the bulk terminal 4 plate 55 receives a
magnetic field such as B perpendicular to the surface to which ohmic contacts P and Q are
applied, and a20EndPage: 1 The resistance between the magnetic field and the resistance change
can be approximately linear, increasing several to tens of times. Fig. 2 (b) is an example of a
practical lanthanum attached to an expanded 20τ substrate of InSb or InAs. The habit is high.
Deposition! It is possible to mass-produce such an element by leaving. 42 Figure 1c) is a Hall
element? In the case of the same bulk 流 す conductor 23) C ohm gauze, when the current It
flows, a difference of up to 14 places occurs in the plane perpendicular to the-current according
to the magnetic field. The semiconductor can be made of S2 or In5blb + As + (hAs, etc. as well as
a thin film deposited with g). 8 in FIG. Although any element may be used publicly, the
magnetoresistive element is convenient because it has few leads. The lead uses a "-" flexible lead,
and in some cases, is used as a voice lead. The negative feedback signal according to the present
invention indicates that the chrysanthemum is a signal source, 31: · · ·, 32 is a speaker, and 33 is
a vibration picked up by the magnetic element 8 (· proportional voltage or 4 currents , And a
circuit that negatively feeds back to the input of 31 via a processing circuit 33 that performs
processing such as filtering and frequency division.
The magnetic sensing element is light in weight, does not adversely affect the speaker vibration,
and has a good frequency characteristic, so that the response is fast and can be made into a
speaker @tR and wide band, and the transient characteristic is also falsified. You can also make a
return. In addition, as shown by g3c '460, a magneto-sensitive cable is inserted into the speaker
person-force line 1 or in parallel 1), and the element non-shape 5 is used to supplement the
speaker non-shape. 6 can also be done; g4 in Figure 4 is a deformation of a sickle to sense the
element's transmission field is taken out from the field of the speaker by a 1.1 + body 42.43 and
applied to the IB element 41. 41 is the same as those of Sueko, 乃至 and 乃至 1 solid roe cedar.
42 base? 411 passes ー 7 (rl) some of the 6's, responding linearly to displacement with
increasing shape 42.43. 4-The light is a general magnet that is sensitive to magnetism and the
cone vibration is 恢 1511), but even if there is a non-edge form in the output for the change, it
can be corrected by the circuit of FIG. Also, as shown in FIG. 60, this non-linearity may be used to
directly compensate for the non-linearity of the loudspeaker. The hand j season element may be
fixed and the field may be moved by #R. Rubber magnets and lightweight light magnets are
suitable for exercise. The lead of the semiconductor element may be a nine-flexible lead or may
be used also as a -S voice coil lead. It is obvious that any arbitrary one such as speaker vibration,
piezo, electlect, leaf type, cylindrical type, horn type etc. may be used. The present invention is
capable of other combinations of the modifications and practical parts limited to the specific 変
形 l.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a loudspeaker system
according to the invention. l ... '', 3 + 4 ... field 4 as 2 ... Drive-coil, 5 ... Damper% 6 ... Peripheral
material, 7 ... 伜, 8.38 ... Last name semiconductor element, 9.10 ····································· 11
··········································································································································································· shows the
ones that changed their positions. The second bad is an example of a paramagnetic
semiconductor stack. 55.56 ··· Magnetoresistance element, 2 o · Hakusan semiconductor, 21 · n · ·
· · · · · · · · · · · home element semiconductor, P · σ · · · Hall area pressure terminal Figure 3
according to the present invention I (a block diagram of the IFI speaker apparatus 30: signal
source 31: amplifier 32: speaker 5: feedback processing circuit 60: non-linear magnetosensitive
element FIG. Fig. 2 shows a variant of Fig. 1; 41 · · · · · · Conducting conductor element, 42.43 · · ·
Magnetic material for field. 1」! Applicant Okamura Futoshi EndPage: 2
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