JPS6145676Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to improvement of a speaker system.

Generally, a speaker system in which a plurality of speakers are attached to a speaker cabinet is equipped with an attenuator that adjusts the efficiency of the speakers and controls their level. The material used for the case of this attenuator is usually a molded synthetic resin such as phenol, which is a rigid material, and the case is directly fixed to the speaker cabinet with screws or the like. . In addition, a name plate that displays the model name, manufacturer's name, etc. is always attached to the speaker system with adhesive, and this name plate is usually made of a thin metal plate to serve as a decorative plate. . Since both the attenuator and nameplate are made of rigid materials, the air pressure inside the speaker cabinet is constantly changing due to the sound pressure radiated from the back of the speaker, and this change in sound pressure causes the cabinet to vibrate. Since the attenuator/name plate fixed to this cabinet has a high mechanical resonance Q value and low internal loss, it has the disadvantage that it generates a sharp characteristic sound unique to rigidity, which impairs the quality of reproduced sound.

This invention was made in order to eliminate these conventional drawbacks, and aims to provide a speaker system that suppresses resonance from these attenuators and nameplates and obtains high quality sound. .

An embodiment of this invention will be described below with reference to the drawings.

In Figures 1 to 3, 1 is a speaker system, 2 is a speaker cabinet of this speaker system, 3 is a butt-full plate of this speaker cabinet, and 4, 5, and 6 are attached to this butt-full plate. Among the plurality of speakers, 4 is a bass speaker, 5 is a medium speaker, and 6 is a treble speaker. Reference numeral 7 denotes a bass reflex port having an opening attached to the buff-full plate, and 8 an attenuator for reducing the efficiency of the mid-range speaker 5 and high-tone speaker 6. The attenuator case 9 is inserted into the hole provided in the buff-full plate 3. This case 9 is attached to the full plate 3 with screws, etc.
is fixed to. 10 is a variable resistor, and 11 is an adjustment knob for this variable resistor. Reference numeral 12 denotes a restraint-type vibration damping material provided in a part of the case 9 of the attenuator 8. This restraint damping material suppresses the natural vibration of the case 9, which causes the cabinet 2 to vibrate due to the sound pressure radiated from the back surface of the speakers 4, 5, and 6, and causes the case 9 of the attenuator 8 to resonate with this vibration. cause dumping.

The constraint-type vibration damping material 12 is a thin plate made of aluminum or the like coated with a damping agent made of a polymer compound that has a mechanical behavior that has both fluid-like powder properties and spring-like elasticity. The damping agent sandwiched between can damp vibrations by converting them into thermal energy.

In addition, Fig. 3 shows an example applied to a name plate,
In this embodiment, a constraint type damping material 12 is attached to the name plate 13 to damp the vibration of the name plate 13.

In the above embodiment, case 9 or name plate 1
Although the restraint-type damping material 12 is provided in a part of the case 3, it may be used on the entire surface, and it goes without saying that the case 9 and the name plate 13 themselves may be formed of the restraint-type vibration damping material 12. .

As described above, according to this invention, it is possible to prevent the generation of natural sound with high mechanical resonance due to the attenuator or nameplate of a speaker system made of rigid material, and it is possible to obtain high quality sound. It is.

[Brief explanation of drawings]

The drawings all show embodiments of this invention.
The figure is a front view of the speaker system, FIG. 2 is an enlarged cross-sectional view, and FIG. 3 is an enlarged cross-sectional view of the name plate mounting portion. In the figure, 1 is a speaker system, 2 is a speaker cabinet, 8 is an attenuator, 9 is a case, 12 is a restraint type damping material, and 13 is a name plate. Note that the same reference numerals in the figures represent the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a speaker system in which an attenuator or name plate made of a rigid material is attached to a speaker cabinet in which one or more speakers are attached, a part or almost the entire surface of the attenuator or name plate made of the rigid material is attached. , a speaker system characterized by being equipped with a constraint-type damping material that suppresses mechanical resonance.