JPH0221799A - Acoustic vibrator device - Google Patents

Abstract

PURPOSE:To obtain a high acoustic vibration transmission efficiency through the production of facial vibration of an elastic member by making the elastic member of a high elastic foaming body. CONSTITUTION:The resonance tube 30 is arranged while being bent sequentially in the entire inside of a cushion member 10. Both ends 36, 38 of the resonance tube 30 are connected to an acoustic box 40 imbedded in the inside of a cushion member 10 similarly. Then the elastic member 10 is made of a high elastic foaming body. Thus, the facial vibration of the elastic member is caused to deliver the acoustic vibration of a tube wall face to a human body efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an acoustic vibration device that transmits acoustic vibrations to a human body.

[Prior Art] Conventionally, elastic members are disposed on the seat and backrest (also chair-shaped, and speakers made of rigid bodies are installed on the back surfaces of the seat and backrest, respectively). etc. 71X
Acoustic vibration devices using an air-acoustic transducer are known.

A person sits on a seat and leans his or her back against the backrest. When an electrical signal containing music or the like is manually applied to an electroacoustic transducer, this electrical signal is also converted into acoustic vibrations. This acoustic vibration is transmitted to the human body via the vibration frequency and the elastic member. Those sitting outside are 1. You can experience music directly, not just through your ears.

[Invention or Solution 1 - Problem to be Solved] The conventional acoustic vibration device described above transmits acoustic vibrations generated by an electroacoustic transducer to the human body through a diaphragm made of a rigid body. In order to increase the number of diaphragms, it would be necessary to arrange a large number of diaphragms and attach an air-acoustic transducer to each diaphragm. Also, because the diaphragm was difficult to vibrate at low frequencies, the low frequency range lacked power.

An object of the present invention is to provide an acoustic vibration device that solves the above problems.

[Means for Solving the Problems] An acoustic vibration device according to the present invention includes a long resonance tube embedded in an elastic member and an electroacoustic transducer that vibrates an air column within the tube. , the elastic member is made of highly elastic foam.

[Function] When an electrical signal containing music or the like is input to the electroacoustic transducer, this electrical signal is converted into acoustic vibration, and the air column inside the tube embedded in the elastic member resonates. Vibrations in the air column cause vibrations in the tube wall. The vibration of the wall is
It propagates within the elastic member and is transmitted to the human body. At this time, since the elastic member is made of a highly elastic foam, surface vibration of the elastic member occurs, and acoustic vibration of the tube wall surface is efficiently transmitted to the human body.

Embodiment FIG. 1 is a perspective view of an acoustic vibration device according to an embodiment of the present invention.

Although the present invention is applicable to an acoustic vibration device having any external shape, for example, the shape of a chair or the like can be adopted, a case of a cushion type will be described here.

The cushion material 10 is a resilient member made of, for example, highly elastic chipped urethane foam. This chip Donauretan foam is an assembly of chip-shaped cell structures bonded together with an adhesive or the like.

A series of long resonance tubes 30 having a circular cross section are buried inside the cushion material IO. However, the cross-sectional shape of this tube can be changed arbitrarily. The resonance tube 30 is a shattered tube made of plastic. This tube has flexibility and can self-maintain a bent shape. The resonance tube 30 is sequentially bent and disposed throughout the entire interior of the cushion material IO. Both ends 36° 38 of the resonance tube 30 are
Similarly, it is connected to an acoustic box 40 buried inside the cushion material 10.

FIG. 2 is an enlarged cross-sectional view of the acoustic box 40 containing an electroacoustic transducer therein.

The inside of the housing 42 is partitioned into a front chamber 4B and a rear chamber 48 by a partition plate 44. An opening 50 is provided in the partition plate 44, and a speaker 52, which is an electroacoustic transducer, is installed so as to face the front chamber 4G through this opening 50.

This speaker 52 has a lead wire 54 for inputting an electrical signal containing music or the like. Front chamber 46 and rear chamber 48
and can communicate with the outside of the acoustic box 40 via pipes 56 and 58, respectively. Pipes 56,58 are connected to both ends 313,38 of the resonant tube 30, respectively.

A person leans against the cushion material 10. At this time, the cushioning material IO is deformed under pressure, and its elasticity holds the human body. The space inside the resonance tube 30 is an elongated space where the sound originates from the acoustic box 40 and enters the box again. The air column in this space is i, r If
It is vibrated by a speaker 52 inside the box 40. The vibration of the air column causes wall vibration of the tube 30, and this wall vibration is transmitted to the human body through the cushion material 10.

To explain in more detail, when an electrical signal is input to the speaker 52 through the lead wire 54, this electrical 1= signal is converted into acoustic vibration. At this time, sound waves are radiated into the resonance tube 30 through the pipe 56 via the front chamber 46 provided in front of the speaker 52 in the acoustic box 40 . The emitted sound waves propagate in the longitudinal direction of the tube while being reflected by the wall surface of the resonance tube 30, and reach the inside of the acoustic box 40 again. The sound waves propagated within the acoustic box 40 are guided into the rear chamber 48 , that is, to the rear of the speaker 52 through the pipe 58 . The sound waves guided into the rear chamber 48 are reflected by the inner wall of this chamber, and are guided back into the resonance tube 30 through the pipe 58 together with the sound waves radiated rearward from the speaker 52. Therefore, a standing wave is formed within the tube 30, and the air column within the tube resonates in the low frequency range. At this time, the pressure waves traveling inside the resonance tube 30 collide with the tube wall surface, causing the wall surface to vibrate well. The acoustic vibrations of the tube 30 are transmitted to the human body through the cushion material IO. At this time, since the cushioning material IO is made of chipped urethane foam, the acoustic vibrations are propagated to the human body without being significantly attenuated due to the high elasticity of the chip boundary surface. Therefore, a person leaning against this acoustic vibration device can directly experience music and the like and at the same time hear it with his or her ears. Moreover, since the air column, which is a resonator, is long, sounds in the low frequency range resonate well, so you can enjoy music with powerful deep bass. Further, since the space for resonance is bent in a 0-shape throughout the cushion material 10, the acoustic vibration sensing area is large. Furthermore, since the front and rear surfaces of the speaker 52 are communicated through the resonance tube 30, the sound pressure generated by the speaker 52 can be effectively utilized.

The above-described acoustic vibration device can be manufactured by preparing two sheet-like tension plates made of chipped urethane foam and sandwiching the resonance tube 30 and the acoustic box 40 between these sheets. Instead of chipped urethane foam, rubber foam, which is also a highly elastic foam, may be used.

[Effect of the invention] As explained above, the acoustic vibration device according to the present invention has the following effects:
Since a long resonance tube is embedded in the elastic member and an electroacoustic transducer is provided to vibrate the air column within the tube, there is a high degree of freedom in the arrangement of the tubes, that is, the arrangement of the resonance space. Therefore, it is possible to efficiently experience acoustic vibrations using at least one electroacoustic transducer, regardless of the external shape of the acoustic vibration device.

Furthermore, when the number of electroacoustic transducers is at least, the vibration sensing area can be increased. Moreover, since it utilizes the resonance of long air columns, it has a powerful bass range and can transmit heavy bass tones in music with high efficiency. Therefore, the dimensions of the electroacoustic transducer may be small.

Furthermore, since the elastic member is made of a highly elastic foam, surface vibration of the elastic member occurs, and high acoustic vibration transmission efficiency can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an acoustic vibration device according to an embodiment of the present invention;
FIG. 2 is an enlarged cross-sectional view of the acoustic box used in the previous acoustic vibration device. Explanation of symbols 10...Cushion material, 30...Resonance tube,
40...Sound box, 52...Speaker. Patent applicant: Toyo Rubber Industries Co., Ltd. agent Patent attorney Tsuta 1) Hakako Sho (1 person) Figure 1

Claims (1)

[Claims] 1. An acoustic vibration device comprising a long resonant tube embedded in an elastic member and an electroacoustic transducer for vibrating an air column within the tube, characterized in that the elastic member is made of a highly elastic foam. Acoustic vibration device.