JPS5489723

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DESCRIPTION JPS5489723
BAa * 1, title of the invention
Ribbon type speaker
3. Detailed Description of the Invention The present invention relates to the improvement of the
diaphragm of a ribbon speaker. * Conventionally, although aluminum is generally used for the
ribbon diaphragm of a ribbon speaker, it is large for a very thin foil. When the temperature of the
diaphragm increases to flow the current, the resistance also increases in proportion to this.
Because of this, the impedance of the speaker increases, the drive current decreases, and the%
current sound pressure decreases. That is, it has a childishness that the sound pressure is
nonlinearly saturated with respect to the input. This all-bright light is intended to eliminate such
a defect. That is, in the illustrated embodiment, it is 1t / i magnet, 2 is a yoke, 3 is a plate, 4 is a
ribbon diaphragm, 5 is a terminal, 6Fi matching transformer, 7 is a lead wire. The ribbon
diaphragm 4 is made of a material having a very small temperature coefficient of resistance as
compared to aluminum, for example, Constanta Advance, Manganin or Western silver etc.
Therefore, a current flows through the ribbon diaphragm 4. Even if the temperature of the
diaphragm rises, the resistance value hardly changes, and the impedance of the speaker does not
change, so the reproduced sound pressure responds linearly to the input as described above
according to the present invention As the ribbon diaphragm 4 is made of a material having a very
small temperature coefficient of resistance compared to aluminum, the reproduced sound
pressure with respect to the input linearly changes. したがって。 Since the sound pressure to the
input is not saturated as in the case of using aluminum, there is an advantage that a speaker with
favorable sound quality can be obtained.
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4. Brief description of the drawings: FIG. 1 is a plan view showing an embodiment of the present
invention in FIG. 1; FIG. 2 is a side sectional view of FIG. 1 Fig. 2 End Page:2
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