CN203870865U

CN203870865U - Sound transmission demonstrator

Info

Publication number: CN203870865U
Application number: CN201420306410.4U
Authority: CN
Inventors: 李建荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-10
Filing date: 2014-06-10
Publication date: 2014-10-08
Anticipated expiration: 2024-06-10

Abstract

The utility model relates to a teaching aid, especially to a sound transmission demonstrator. With the sound transmission demonstrator, a problem that the sound transmission effect by the solid can not be reflected by the existing sound transmission demonstrator in the prior art can be solved. The sound transmission demonstrator comprises a tank body, a sealing cover for sealing the tank body, an air exhauster connected with the sealing cover by a gas pipe and being used for evacuating air from the tank body, a sounder suspended below the sealing cover and arranged in the tank body, a remote controller for controlling on and off of the sounder, a sound pickup head for picking up sound, a loudspeaker connected with the sound pickup head by a lead, and a rubber ring sleeved at the tank body and being used for fixing the sound pickup head at the tank body. The sound pickup head is moved close to the tank body; and as the air in the tank body is removed by the air exhauster, the sound fades away gradually. Compared with the traditional demonstrator, the provided demonstrator has the good sealing effect and the sound change becomes obvious. When the sound pickup head and the tank body are contacted, the user can feel that the sound is enhanced obviously, so that the sound transmission effect in the solid can be experienced. Moreover, the provided sound transmission demonstrator has advantages of simple manufacturing, simple operation, low cost, and good effect.

Description

A kind of sound propagation demonstrator

Technical field

The utility model relates to a kind of teaching aid, relates in particular to a kind of sound propagation demonstrator.

Background technology

For the propagation that proves sound to student needs medium, while propagation in air, along with reducing of atmospheric density, the ability of sound transmission weakens, and is mainly to test to verify by bell jar at present, but bell jar experiment sealing effectiveness is poor, DeGrain; In addition existing sound propagation demonstrator function singleness, can not embody solid and the liquid effect to transmission sound.

Utility model content

The utility model provides a kind of sound propagation demonstrator, is intended to solve sound propagation demonstrator in prior art and can not embodies the problem of solid to transmission sound effect.

In order to solve above technical matters, the utility model is achieved through the following technical solutions: a kind of sound propagation demonstrator, comprise tank body, be connected with gland bonnet for the gland bonnet of sealed shell of tank, by tracheae and for extract out air in tank body air pump, be suspended on gland bonnet below and be positioned at the acoustical generator of tank body, for controlling the telepilot of acoustical generator switch, for the loudspeaker that picks up the pick-up head of sound, be connected with pick-up head by wire, be socketed on tank body and for pick-up head being fixed on to the rubber ring on tank body.

Further, also comprise tank for placing tank body, for sealing the balloon skin of pick-up head; Be convenient to measure the effect that sound transmits in liquid.

Further, described loudspeaker is provided with earphone; Be convenient to differentiate the variation of sound size.

Further, described telepilot and loudspeaker are fixed together; Convenient operation.

Compared with prior art the utility model has the advantages that: the acoustical generator in the utility model is suspended in tank body, by pick-up head, near tank body, along with air pump is taken the air in tank body away, sound can weaken gradually, relatively traditional demonstration device good sealing effect, sound variation is obvious; Pick-up head is contacted with tank body, can experience sound and obviously strengthen, experience the communication effect of sound in solid; The utility model is made simple, operates also simply, and cost is low, effective.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is by the structural representation after gentle tank body in Fig. 1 covering transparence;

Fig. 3 is structural representation of the present utility model when tank body is put into pond.

Embodiment

Consult Fig. 1, Fig. 2 and Fig. 3, a kind of sound propagation demonstrator, comprise tank body 1, be connected with gland bonnet 2 for the gland bonnet 2 of sealed shell of tank 1, by tracheae 3 and for extract out tank body 1 interior air air pump 4, be suspended on gland bonnet 2 belows and be positioned at the acoustical generator 5 of tank body 1, for controlling the telepilot 6 of acoustical generator 5 switches, for the loudspeaker 8 that picks up the pick-up head 7 of sound, be connected with pick-up head 7 by wire, be socketed on tank body 1 and for pick-up head 7 being fixed on to the rubber ring 9 on tank body 1; Also comprise tank 10 for placing tank body 1, for sealing the balloon skin 12 of pick-up head 7; Described loudspeaker 8 is provided with earphone 11; Described telepilot 6 is fixed together with loudspeaker 8.

When use, pick-up head 7 is fixed on tank body 1 with rubber ring 9, then opens acoustical generator 5 with telepilot 6, bring earphone 11, with air pump 4, the gas in tank body 1 is extracted out, can experience sound by earphone 11 and can weaken gradually; In the time that air pump 4 quits work, pick-up head 7 is taken off from tank body 1, taking off moment, can find that sound weakens suddenly, can prove that sound transmission capacity in air is not so good as the transmission capacity in solid; Not only can verify that by this experiment sound propagates in air, along with the sound transmission ability that weakens of atmospheric density weakens; The aerial transmission capacity of sound is less than the transmission capacity in solid.

Consult Fig. 3, pick-up head 7 is taken off from tank body 1, on pick-up head 7, put balloon skin 12, tank body 1 is put into liquid cell 2, pick-up head 7 is put into water, bring earphone 11, can hear sound, prove that sound can be at water transmission; Then pick-up head 7 is contacted to tank body 1, can find at Contact, sound increases, and illustrates that the transmission capacity of sound in solid is better than the transmission capacity in water.

Acoustical generator in the utility model is suspended in tank body, adopts rubber ring to be fixed on tank body pick-up head, and along with air pump is taken the air in tank body away, sound can weaken gradually, relatively traditional demonstration device good sealing effect, and sound variation is obvious; The utility model can compare checking to sound transmission capacity in air, liquid and solid; The utility model is made simple, operates also simply, and cost is low, effective.

The foregoing is only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.

Claims

1. a sound propagation demonstrator, it is characterized in that: comprise tank body (1), for the gland bonnet (2) of sealed shell of tank (1), be connected with gland bonnet (2) by tracheae (3) and for extracting the air pump (4) of the interior air of tank body (1) out, be suspended on gland bonnet (2) below and be positioned at the acoustical generator (5) of tank body (1), be used for controlling the telepilot (6) of acoustical generator (5) switch, for picking up the pick-up head (7) of sound, the loudspeaker (8) being connected with pick-up head (7) by wire, be socketed on tank body (1) and for pick-up head (7) being fixed on to the rubber ring (9) on tank body (1).

2. a kind of sound propagation demonstrator according to claim 1, is characterized in that: also comprise tank (10) for placing tank body (1), for sealing the balloon skin (12) of pick-up head (7).

3. a kind of sound propagation demonstrator according to claim 1, is characterized in that: described loudspeaker (8) is provided with earphone (11).

4. a kind of sound propagation demonstrator according to claim 1, is characterized in that: described telepilot (6) is fixed together with loudspeaker (8).