JPH03198096A - Device for converting equipment noise agreeable - Google Patents

Abstract

PURPOSE:To make the sound field of an equipment noise into com-fortness with the tone color of superimposed sound by presuming a noise as base sound, editing a sound generating program matching to that, and utilizing the blast function of equipment. CONSTITUTION:A command is issued from a control part 1 to the cylinders 12a, 12b of a flow velocity adjuster 2, and the aperture of valves 13 of the cylinders 12a, 12b are adjusted based on the command from the control part 1, and the flow velocity of fluid passing an air vent 11c is varied, and the fluid is brought into contact with the string 3a of sounding equipment 3, and a Karman vortex is generated at the downstream side, and sound based on the Karman vortex resonates at a resonance box 3, then, the sound is emitted. The sound is the one matching with the noise setting the equipment noise as the base sound, and the sound is superimposed on the equipment noise, and a comfortable sound field can be comprised. In such a way, comfortable environ ment by the sound can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an equipment noise amelioration device for improving the sound field of equipment noise.

[Conventional technology]

Noise generation is unavoidable when operating machinery, such as in manufacturing plants.
It is common to take measures to reduce noise using techniques such as sound absorption.

[Problem to be solved by the invention]

However, this countermeasure simply involves understanding the sound field of the noise emitted by the equipment and applying soundproofing treatments such as the above-mentioned sound insulation and sound absorption technologies to reduce the noise. Physically speaking, it is impossible to completely eliminate noise.

However, it is possible to prevent noise from being emitted to the surrounding area to a considerable extent by applying a sound insulating seal to cover the entire equipment that produces noise. However, there is no way to prevent this in a work environment where machines are basically operating.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device for making equipment comfortable, which uses equipment noise to make the sound field caused by the noise more comfortable.

[Means to solve the problem]

In order to achieve the above object, the equipment noise amenity improvement device according to the present invention converts the air blown out from the equipment with the air blowing function into sound, and superimposes the tone on the noise emitted by the equipment to create the superimposed sound. This device makes the sound field of equipment noise more comfortable with the timbre of the superimposed sound, and includes a flow velocity regulator, a sound generator that generates a sound with a frequency different from that of the equipment noise, and a control unit, The regulator controls the flow rate of the fluid when it passes through the device, and the sound generator is a string that comes into contact with the fluid flowing out from the flow rate regulator to generate a Karman vortex on the downstream side. and a resonance box that intensifies the sound based on the Karman vortex,
The control unit issues a command to the flow rate regulator to control the fluid flow rate, and when equipment noise is treated as a base sound, it generates a tone that matches the base sound. It has the function of adjusting the flow velocity necessary to generate sound.

[Principle/effect]

The apparatus for making equipment noise more comfortable according to the present invention generates sound by utilizing the Karman vortex generated downstream of a columnar object when the flow of fluid is relatively fast.

The generation period f of Karman vortex is Here, U is the flow rate of the fluid and D is the diameter of the cylinder.

The present invention controls the flow rate of the blown fluid including the exhaust from the equipment, generates a sound by the Karman vortex defined by the flow rate, superimposes the tone on the equipment noise, and turns the equipment noise into a base sound. By combining tones that harmonize with this base sound, the noise does not feel like noise, creating pleasant music and creating a comfortable working environment.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In the figure, the present invention converts the air blowing from a device with a blowing function into a tone, and superimposes this sound on the device noise.
This device makes the sound field caused by equipment noise more comfortable, and includes a flow rate regulator 2, a sound generator 3, and a control section 1.

Here, devices with a ventilation function include air conditioners that blow fluid at a constant speed, devices with cooling fans, rotating machines,
Other equipment that generates air during operation.

As shown in FIG. 4, the sound generator 3 includes a resonance box 3b and stays 3c attached to both ends of the resonance box 3b.

3C and the stays 3c and 3C are stretched parallel to each other, and the resonance box 3
a plurality of strings 3a of different diameters stretched at a constant distance on b;
3a..., and the structure is such that when the fluid comes into contact with the strings 3a, the Karman vortex flow generated on the downstream side of the strings 3a is used to intensify the sound in the resonance box 3b and generate the sound.

The flow rate regulator 2 is shown in FIGS. 3(a), (b), and 5.
As shown in the figure, it has a width corresponding to the length of the string 3a of the sound generator 3, is bent into a U shape, and has a fluid intake socket 11a on the back side facing the string 3a and the front side opposite to the string 3a. A frame body 11 is provided on the back surface 11b facing the strings 3a, 3a, . . . of the sound generator 3. The frame 11 is provided with a vent 11c that faces the socket 11a and opens in a direction perpendicular to the strings 3a, 3a, . . . , and a valve 13 that changes the opening area of the vent 11c. , the valve 13 has both ends connected to the piston rod P of the cylinders 2a and 12b.
, P. The valve 132 is driven by the cylinders 2a and 12b to open the vent 11.
Change the opening area of C. The flow rate of the fluid flowing into the socket 11a changes in inverse proportion to the opening area of the vent 11c.

In addition, the piston rods P and P of the cylinders 2a and 12b
2 is the valve 1 by moving parallel to the wind direction of the fluid.
3, the opening area of the vent 11c is adjusted with high precision.

As shown in FIG. 2, the control unit 1 adjusts the valve opening of the flow rate regulator 2, and includes an input board 4, a microcomputer 10, and an output board 8. Further, the microcomputer 10 has a RAM 5 and a CP
It has U6 and ROM7. Parameters for control are stored in the RAM 5 through the interface of the input board 4, and in the ROM 7, the programming necessary for the sound generator 3 to generate a sound that matches the equipment noise as a base sound (equivalent to arrangement in the case of music) is stored in the ROM 7. Based on the program in the ROM 7, the CPU 6 processes the data necessary to make the sound generator 3 produce sound along with the parameters stored in the RAM 5, and sends the data via the interface of the output board 8. This is issued as a control command for the cylinders 12a and 12b of the flow rate regulator 2.

In the embodiment, a program is stored in advance in the ROM 7 of the control unit 1, and parameters for control are written in the RAM 5. In this state, as shown in FIG. The fluid to be blown is introduced into the two ports 11a of the flow rate regulator.

Here, a command is issued to the cylinders 12a and 12b of the flow rate regulator 2 from the control unit 1, and as the program in the ROM 7 is executed, the cylinders 12a and 12b adjust the opening degree of the valve 13 according to the command from the control unit 1. Adjust accordingly.

As a result, the flow velocity of the fluid passing through the vent 11c is changed, the fluid contacts the string 3a of the sound generator 3, and a Karman vortex is generated on the downstream side, and the sound based on the Karman vortex resonates in the resonance box 3b. Makes a beeping sound. This sound is a sound that matches the equipment noise as a base sound, and this sound is superimposed on the equipment noise to create a comfortable sound field and create a comfortable environment by sound.

In addition, as shown in FIG. 5, a plurality of flow rate regulators 2.2.
... may be provided in parallel to the strings 3a of the sound generator 3 to generate chords, that is,
The flow rate of fluid from the equipment is V. When the fluid is closed, the fluid flows through the small-volume socket 11 of the U-shaped frame 11 of the flow rate regulator 2.
By flowing into a, its flow velocity V (vl〉v.)
becomes faster. If there are multiple flow rate regulators 2, the vents 11
Based on the difference in the opening area of c, flow velocities V2, V3 <V3>V2) after passing through each vent 11c are created,
By making sounds with the sound generator 3 using the flow rate fluid, sounds of different frequencies are simultaneously emitted to create a chord. According to this embodiment, the chord is superimposed on the equipment noise, and this is not perceived as noise, making it pleasant. It has the advantage of being perceived as sound that shapes the environment.

〔Effect of the invention〕

As explained above, the present invention treats noise as a base sound and provides sound generation programming that matches it (for example,
By editing the sound (music) and using the device's ventilation function, you can play the programmed sound and add it to the noise to change the device noise into a comfortable sound, creating a comfortable environment with sound. It has the effect that it can.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 is a block diagram showing the control section, Fig. 3(a) is a perspective view of the flow rate regulator seen from the front side, Fig. 3(b) 4 is a perspective view showing the sound generator, and FIG. 5 is a diagram showing the arrangement of the flow rate regulator and the sound generator. 1...Control unit 2...Flow rate regulator 3...
・Sound generator 3a...Sound generator string 3b...
sound generator resonance box

Claims (1)

[Claims] (1) Converts the air sent from a device with a ventilation function into sound, and superimposes the tone on the noise emitted by the device to generate a superimposed sound, making the sound field of the device noise comfortable with the tone of the superimposed sound. This device includes a flow rate regulator, a sound generator that generates a sound with a frequency different from the equipment noise, and a control unit, and the flow rate regulator is configured to control the flow rate when the fluid blown from the equipment passes. The sound generator controls the flow velocity of the fluid, and includes a string that comes into contact with the fluid flowing out from the flow velocity regulator to generate a Karman vortex flow downstream, and a resonance box that intensifies the sound based on the Karman vortex flow. , which generates a tone according to the flow rate of the fluid.The control unit issues a command to the flow rate regulator to control the flow rate of the fluid, and when equipment noise is treated as the base sound, it generates a tone that matches the base sound. 1. A device for making equipment noise comfortable, characterized by having a function of adjusting the flow velocity to a level necessary to generate sound.