CN216527698U

CN216527698U - Portable sound characteristic comprehensive demonstration box

Info

Publication number: CN216527698U
Application number: CN202123314703.6U
Authority: CN
Inventors: 郭波; 于智祥; 孙博达; 陈冬平; 王蕊; 杨旭东
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-05-13
Anticipated expiration: 2031-12-27

Abstract

A portable sound characteristic comprehensive demonstration box belongs to the field of teaching instruments and comprises a suitcase, a cone loudspeaker, a sound suspension tube, a sound suspension cylinder, a visual sound reflection film, a laser pen, a gong and play platform, a vibration doll, a non-Newtonian fluid container, a hydrophobic film container, a stud doll, a magnet disc, a coming checking plate and the like. Through simple assembly and overlapping, the visual effects of the acoustic suspension phenomenon, the acoustic vibration track, the Clarnian graph, the powder transportation, the object vibration, the non-Newtonian fluid modeling, the water surface standing wave and other acoustic characteristics can be conveniently demonstrated. The phenomenon of this device demonstration has very strong interest, not only is applicable to the demonstration experiment in classroom, more is applicable to in the popular science activity of attracting eyeball. And the design of a suitcase is adopted, so that the suitcase is convenient to carry.

Description

Portable sound characteristic comprehensive demonstration box

Technical Field

The utility model belongs to the field of teaching instruments and relates to an experimental device for audio vibration characteristics.

Background

Sound is a mechanical vibration that a person can hear. Mechanical vibration is a mechanical phenomenon that varies periodically and has various manifestations in solid, liquid and gas. The non-uniformity of air pressure in the air can cause the phenomenon of acoustic suspension overcoming gravity; standing wave patterns of sound can be seen in liquids and solids; when periodic vibration acts on a non-linear fluid, such as a non-Newtonian fluid, the fluid may exhibit various irregular vibrations; when periodic vibrations act on the solid powder, a transport phenomenon against gravity is also exhibited. These phenomena are all visually observed, and many experimental devices for observing sound effects are available, such as: visual sound experiments, gong and play experiments, bubble sinking and the like. However, at present, there is no experimental device which comprehensively expresses the above phenomena.

Disclosure of Invention

In order to conveniently show various visual effects of sound by using a set of experimental device, the utility model provides a comprehensive demonstration device capable of demonstrating the visual effects of various sounds.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the portable sound characteristic comprehensive demonstration box comprises a suitcase and a cone speaker, wherein the speaker is installed in the suitcase, and when the suitcase is opened, a horn mouth of the speaker is exposed; the suitcase is also provided with an acoustic suspension tube, an acoustic suspension cylinder, a visible sound reflection film, a laser pen, a gong and play platform, a vibration doll, a non-Newtonian fluid container, a hydrophobic film container, a tack doll, a magnet disc and a second checking plate; mounting holes are formed around the horn mouth of the horn; the sound suspension pipe consists of a pipe seat matched with the mounting hole and a vertical transparent circular pipe with the inner diameter of 1-4 cm and the length consistent with the length in the suitcase; the sound suspension cylinder consists of a cylinder seat matched with the mounting hole and a vertical transparent cylinder with the inner diameter smaller than the caliber of the horn and the length of 10-20 cm, net plugs are arranged at two ends of the cylinder, and a group of light particles are contained in the cylinder; the visible sound reflection film and the laser pen comprise a hollow pedestal matched with the mounting hole, a reflection film covered on the hollow pedestal, a laser pen and a universal shaft, the laser pen is mounted on a shaft head of the universal shaft, and the universal shaft can be inserted beside the loudspeaker when the suitcase is opened; the gong-play platform and the vibration doll comprise a hollow pedestal, a flat plate capable of being installed on the hollow pedestal and a doll with vertical bristles arranged at the bottom; the non-Newtonian fluid container is a container formed by the hollow pedestal and a thin film attached to the cone of the horn; the hydrophobic film container is composed of the hollow pedestal and a hydrophobic film covered under the hollow pedestal; the pin doll and the magnet disc comprise a doll made of pins and light materials and a disc-shaped magnet which can be placed below the horn and has the magnetization direction consistent with the axis of the horn; the second checking plate is a light thin metal plate which can be placed in the suitcase, a support is fixed at the center of gravity, and a suction disc is arranged at the other end of the support; the suitcase is also internally provided with a multi-input-port audio power amplifier, a multi-interface audio receiver connected with the input of the amplifier, a sine wave generator connected with the input of the amplifier, an external socket connected with the input of the amplifier, and a connecting wire and a socket for connecting the amplifier and the loudspeaker; and a power supply module for supplying power to the amplifier, the audio receiver and the sine wave generator and a wire connected with commercial power are also arranged in the suitcase.

Three loudspeakers are arranged in the suitcase and respectively respond to high frequency, medium frequency and low frequency, and each loudspeaker is provided with one socket.

The utility model can conveniently demonstrate the acoustic suspension phenomenon, visual sound experiment for seeing the sound vibration track, Cranib pattern, powder transportation, object vibration, non-Newtonian fluid modeling, water surface standing wave and the like by simple assembly and lapping. The demonstration device has strong interestingness in demonstrating phenomena, is not only suitable for demonstration experiments in a classroom, but also is more suitable for popular science activities attracting eyeballs. And the design of a suitcase is adopted, so that the suitcase is convenient to carry.

Drawings

FIG. 1 is an external view of a preferred embodiment of a portable sound characteristic integration demonstration case of the present invention;

FIG. 2 is a schematic view of the preferred embodiment of the tool box of FIG. 1 shown in an open configuration;

FIG. 3 is a schematic structural view of the acoustic levitation tube assembly of the preferred embodiment shown in FIG. 1;

FIG. 4 is a schematic diagram of the construction of the acoustic suspension cylinder assembly of the preferred embodiment shown in FIG. 1;

FIG. 5 is a schematic diagram of the non-Newtonian fluid container fitment of the preferred embodiment of FIG. 1;

FIG. 6 is a schematic view of the structure of the visual sound reflecting film assembly in the preferred embodiment of FIG. 1;

FIG. 7 is a schematic view of the visual sound reflecting membrane assembly of the preferred embodiment of FIG. 1 in use;

fig. 8 is a schematic view of the structure of the first plate fitting in the preferred embodiment shown in fig. 1.

In the figure: 1. loudspeaker, 2, loudspeaker panel, 3, mounting hole, 4, interface, 5, laser head socket, 6, audio source module, 7, sine wave generator module, 8, audio amplifier module, 9, power module, 10, accessory storehouse apron. 11. The device comprises an accessory bin 12, a transparent round tube 13, a banana plug 14, a tube seat 15, a tube seat 16, a transparent cylinder 17, a net plug 18, light particles 19, a hollow pedestal 20, a film 21, a reflecting film 22, a laser pen 23, a universal shaft 24, a laser beam 25, a thin metal plate 26, a support column 27 and a sucker.

Detailed Description

The preferred embodiment of the present invention employs a portable tool case as the instrument housing, as shown in fig. 1. Half in the box is as loudspeaker panel 2, wherein installs three loudspeaker 1 that responds low frequency, intermediate frequency, high frequency respectively, and loudspeaker 1 adopts the cone loudspeaker to the cone adopts water-fast material, and the dust cover adopts the indent type above the cone, and the cone adopts the rubber material with the elasticity of fixed frame is folded the ring. Four mounting holes 3 are arranged on the periphery of each loudspeaker 1 on the loudspeaker panel 2; three insertion ports 4 are also arranged to be electrically connected with each horn 1 respectively.

The other half of the box body is provided with an audio source module 6, a sine wave generator module 7, an audio amplifier module 8, a power supply module 9 and an accessory bin 11. The audio source module 6 adopts a card reading board, and can be used for FM radio, AUX input, Bluetooth audio input and USB + TF card insertion; the sine wave generator module 7 can generate a sine wave signal of 10-10000 Hz; the audio amplifier module 8 has multiple inputs which can be connected with the outputs of the audio source module 6 and the sine wave generator module 7, and can also be connected with a microphone and an external audio (AUX input), and the output of the audio amplifier module can be connected with the loudspeaker 1 through a connecting wire and the interface 4; the power supply module 9 is connected with the mains supply through a socket and provides power supplies with corresponding voltages for the audio source module 6, the sine wave generator module 7 and the audio amplifier module 8; be furnished with accessory storehouse apron 10 above accessory storehouse 11, its inside sound suspension pipe, sound suspension section of thick bamboo, visual sound reflection membrane and laser pen, gong play platform and vibration doll, non-Newtonian fluid container, hydrophobic film container, stud doll and magnet dish, look into accessories such as board to and connecting wire and power cord, wherein:

as shown in fig. 3, the sound suspension tube is composed of a tube base 14 and a vertical transparent circular tube 12 with an inner diameter of 1-4 cm, and the length of the transparent circular tube 12 is as long as the volume of the tool box can allow. The transparent round tube 12 is a glass tube or an acrylic tube. Banana plugs 13 are provided at the four corners of the stem 14 to be fitted into the four mounting holes 3 around the horn 1. The sound suspension pipe is inserted on the bell mouth of the low-audio frequency section during demonstration, the table tennis or the foam ball is placed into the transparent circular pipe 12, and when strong sound is emitted, the table tennis or the foam ball can jump up and down along with the strength of the sound.

As shown in fig. 4, the sound suspension cylinder is composed of a cylinder base 15 and a vertical transparent cylinder 16 with a length of 10-20 cm, the inner diameter of the transparent cylinder 16 is smaller than the caliber of the horn but is as consistent as possible with the caliber of the horn, net plugs 17 are arranged at two ends of the cylinder, and a group of light particles 18 such as foam particles are contained in the cylinder; banana plugs 13 are provided at four corners of the barrel holder 15 to be inserted into the four mounting holes 3 around the horn 1 of the bass frequency range. The sound suspension cylinder is inserted and placed on the bell mouth of the low-frequency section during demonstration, and when strong sound is emitted, the light particles 18 in the transparent cylinder 16 can fly up and down along with the strength of the sound.

As shown in fig. 5, the non-newtonian fluid container is a container composed of a hollow base 19 and a film 20 attached to the cone of the horn 1; the hollow pedestal 19 is a thicker square acrylic plate, and a round hole with the same caliber as the loudspeaker 1 is dug in the middle; the four corners of the hollow pedestal 19 are provided with banana plugs 13 which are inserted in cooperation with the four mounting holes 3 around the horn 1 of the middle-audio band or the bass band. The non-Newtonian fluid container is inserted and placed on the bell mouth of the middle audio frequency section or the low audio frequency section during demonstration, the non-Newtonian fluid is poured into the container formed by the film 20, single sinusoidal sound waves are emitted, the frequency is adjusted, the sound intensity is adjusted in a matched mode, and the non-Newtonian fluid can change into a random and incredible shape along with the sound.

The hydrophobic film container is a container composed of the hollow pedestal 19 and a hydrophobic film covering the lower surface of the acrylic plate constituting the hollow pedestal; banana plugs 13 are provided at four corners of the hollow pedestal 19 to be inserted in cooperation with the four mounting holes 3 around the horn 1 in the middle-pitched or the high-pitched tone range. The hydrophobic film container is inserted and placed on a horn mouth of a middle audio frequency band or a high-pitch frequency band during demonstration, water is dripped on the hydrophobic film to form a water mass, a single sine sound wave is emitted, the sound wave pushes the hydrophobic film, the water mass can form 'petals', the frequency is adjusted, and the shape of the 'petals' can also be changed.

As shown in fig. 6, the visible sound reflection film and the laser pen include the hollow base 19, the reflection film 21 covering the hollow base, the laser pen 22, and the universal shaft 23; banana plugs 13 are arranged at four corners of the hollow pedestal 19 and are inserted into the four mounting holes 3 around the loudspeaker 1 of the bass frequency section or the middle-bass frequency section in a matching way; the laser pen 22 is installed on the shaft head of the universal shaft 23, and the universal shaft 23 can be inserted into the laser head socket 5 on the horn panel 2. As shown in fig. 7, the visual sound is inserted into the bell mouth of the bass frequency band during the demonstration, the laser pen is turned on, and the laser beam 24 is made to shine on the reflective film 21 and be reflected to the screen or the white wall. When sound is emitted, the sound wave pushes the reflective film 21 to vibrate, so that the laser beam 24 draws a "sound track" on a screen or a white wall.

The gong-play platform and the vibration doll comprise a hollow pedestal 19, a flat plate capable of being installed on the hollow pedestal and a doll with vertical bristles arranged at the bottom; banana plugs 13 are provided at four corners of the hollow pedestal 19 to be fitted into the four mounting holes 3 around the horn 1. Gong plays and inserts when the demonstration and put on the horn mouth of well audio frequency section, place the doll on the flat board, when sound is played, the doll can remove, rotate on the platform.

The pin doll and the magnet disc comprise a doll made of pins and light materials and a strong disc-shaped magnet which can be placed below the horn and has the magnetization direction consistent with the axis of the horn. When the tack dolls are demonstrated, the tack dolls are placed in the paper basins of the loudspeakers, one or more than one tack dolls can be placed, the disc-shaped magnets are placed below the corresponding loudspeakers, at the moment, the tack dolls can stand in the paper basins (if the magnets of the loudspeakers can enable the tack dolls to stand up, the disc-shaped magnets can be omitted), and when sound is emitted, the tack dolls can jump in the paper basins along with the sound; when a plurality of the tack dolls are arranged, a symmetrical formation is formed.

As shown in fig. 8, the first plate is a light thin metal plate 25, and when the tool box allows, the first plate has a size as large as possible, and may be a regular polygon, or other symmetrical shapes or irregular shapes, the conventional shape includes a regular triangle, a square, etc., a pillar 26 is fixed at the position of the center of gravity of the metal plate, and the first plate can be in a buckle form, or in a screw form, and can be detached to be conveniently placed in the tool box; the other end of the post 26 is provided with a suction cup 27 which can be sucked on the paper cone of the horn 1. When the demonstration of checking the first plate is carried out, the first plate is found to be standing on a cone of a loudspeaker through the sucking disc 21, sand is uniformly scattered on the thin metal plate 25, a single sinusoidal sound wave is emitted, the sound wave pushes the thin metal plate 25 to vibrate, the frequency is adjusted, and when the thin metal plate 25 forms standing waves, the sand on the thin metal plate shows a Clarnia graph; the frequency is changed and the kranib pattern changes as the thin metal plate 25 forms a new standing wave.

The present embodiment can also demonstrate other vibratory visual effects, such as powder transport: a small amount of powdery substances such as starch and the like are added into the horn 1, and when single sinusoidal sound wave is emitted, the powder moves upwards along the slope of the horn cone; and then, as the bubbles sink: the small bottle filled with water is fixed in a trumpet paper basin through a sucking disc, a single sinusoidal sound wave is emitted, the frequency is adjusted, and air bubbles in the water sometimes move downwards.

The above is a description of the device and associated experiments of the preferred embodiment of the present invention. According to the above devices and principles, more sound characteristic visual effects can be combined.

Claims

1. Demonstration case is synthesized to portable sound characteristic, including the suitcase, cone loudspeaker, its characterized in that: the horn is arranged in the suitcase, and when the suitcase is opened, a horn mouth of the horn is exposed; the suitcase is also internally provided with an acoustic suspension tube, an acoustic suspension cylinder, a visual sound reflecting film, a laser pen, a gong and play platform, a vibration doll, a non-Newtonian fluid container, a hydrophobic film container, a stud doll, a magnet disc and a second plate for checking; mounting holes are formed around the horn mouth of the horn; the sound suspension pipe consists of a pipe seat matched with the mounting hole and a vertical transparent circular pipe with the inner diameter of 1-4 cm and the length consistent with the length in the suitcase; the sound suspension cylinder consists of a cylinder seat matched with the mounting hole and a vertical transparent cylinder with the inner diameter smaller than the caliber of the horn and the length of 10-20 cm, net plugs are arranged at two ends of the cylinder, and a group of light particles are contained in the cylinder; the visible sound reflecting film and the laser pen comprise a hollow pedestal matched with the mounting hole, a reflecting film covered on the hollow pedestal, the laser pen and a universal shaft, the laser pen is mounted on a shaft head of the universal shaft, and the universal shaft can be inserted beside the loudspeaker when the suitcase is opened; the gong and play platform and the vibration doll comprise a hollow pedestal, a flat plate capable of being installed on the hollow pedestal and a doll with vertical bristles arranged at the bottom; the non-Newtonian fluid container is a container formed by the hollow pedestal and a thin film attached to the cone of the horn; the hydrophobic film container is composed of the hollow pedestal and a hydrophobic film covered under the hollow pedestal; the pin doll and the magnet disc comprise a doll made of pins and light materials and a disc-shaped magnet which can be placed below the horn and has the magnetization direction consistent with the axis of the horn; the second checking plate is a light thin metal plate which can be placed in the suitcase, a support is fixed at the center of gravity, and a suction disc is arranged at the other end of the support; the suitcase is also internally provided with a multi-input-port audio power amplifier, a multi-interface audio receiver connected with the input of the amplifier, a sine wave generator connected with the input of the amplifier, an external socket connected with the input of the amplifier, and a connecting wire and a socket for connecting the amplifier and the loudspeaker; and a power supply module for supplying power to the amplifier, the audio receiver and the sine wave generator and a wire connected with commercial power are also arranged in the suitcase.

2. The portable sound characteristics integrated presentation case of claim 1, wherein: three loudspeakers are arranged in the suitcase and respectively respond to high frequency, medium frequency and low frequency, and each loudspeaker is provided with one socket.