Fast Sound Propagation in Gas
In the case of gas the volume changes occur and is related to the modulus of elasticity of the material is the bulk modulus (given a notation k). It can be shown that a sound wave propagates in the gas, k = γP with P is the pressure of the gas and γ is the laplace constant, which is the value of the ratio of heat capacity at a constant pressure and a fixed volume, γ =. Thus, the speed of sound propagation in the gas is as follows.
Fast sound propagation in gas
Application of sound reflection properties in daily life
Measuring the Depth of the Sea
Fast sound propagation in sea water is known. To measure the depth of the sea, the ship emits sound to the sea floor. At the bottom of the ship there is a sound detector (detector), this detector produces electric waves if it gets reflected sound. By measuring the time it takes from the sound emitted to being captured again by the detector, the depth of the sea below the position of the ship can be determined so that the depth of the sea of an area can be carefully mapped.
Knowing the fish content under the sea
By directing sound waves into the sea we can find out the fish content under the sea. Some waves will be reflected by fish swimming below sea level. We can distinguish reflective waves of stationary objects and moving objects.
Measuring the length of the cave passage
Sound wave reflection is also used by humans to measure the length of a cave and the depth of the ocean or lake. By sending the incoming sound and measuring the travel time of the incoming sound and the sound of reflection, the length of a cave or the depth of a place below the surface of the water can be determined.
The reflected sound received has traveled twice, namely from the sound source to the reflector and from the reflector to the receiver or listener. The time needed to get to the bouncer is 1/2 t
Formula Measuring the length of the cave passage
Therefore, the distance traveled by the reflected sound can be written as follows.
Investigate the layers of the earth
Waves actually do not have to be reflected by hard objects, reflections on soft objects that actually occur namely reflection and continuation.
The earth's crust consists of various layers of material. If sound waves are generated on the surface (for example: blasting dynamite), these waves propagate into the inner crust of the earth. After finding different layers of the earth's crust, some of the waves will be reflected.
By measuring the time it takes the reflected wave to return to the earth's surface the depth of a layer can be determined. The benefits of investigating the contents of a mining product can thus be known of the goods and quantities of the goods.
While singing in the bathroom
When you sing in the bathroom, your voice sounds louder and easier to hear than you sing in a large, open room. The sound of music in a closed room sounds louder than the sound of music in an open space.
This happens because in a small room, the sound that comes on the wall with the sound reflected to your ears almost at the same time so that the sound of bounce will strengthen the original sound that causes your voice to sound louder.