Examples of Sound or Acoustic Energy

The acoustic energy (or sonorous) is the one transmitted by sound waves, proceeding from the vibrational wave and propagating to the particles of the medium that pass through in the form of Kinetic energy and of potential energy. For example: the vibrations that are generated inside a box television.

It complies with all the generalized laws of energy, in particular with the one of conservation by which if there is no other type of transformation, the incident energy will be equal to the sum of transmitted, dissipated and reflected energies.

The unit of measurement used to express sound or acoustic energy is the July (J): the density of acoustic energy is measured in July per cubic meter (J / m3).

Propagation of sound energy

The best way to think about how sound energy works is to think about a very long tube filled with air, which is made up of a very large amount of small particles or molecules. The air inside the tube begins in a state of rest, in a dynamic equilibrium as the molecules move in all directions due to thermal agitation.

If a motion wave into the tube, the molecules closest to the movement will be pushed, but these will lead to the original disturbance propagating along the tube. The propagation of sound energy also works in this way, with linear characteristics of waves propagating through the same space at the same time without being affected.

Properties of sound energy

The waves They are often difficult to signify due to their unobservable nature, but they spread through materials (both in solid, liquid or gaseous state) with a speed that depends on the elastic properties and inertials of the medium.

The waves are generally divided between the transversal and the longitudinal, group to which sound waves belong: this is easy to notice in the case of string musical instruments. The graphic representation of the sound waves is made through an oscillogram that shows the value of the sound pressure at each instant in time.

Sound energy applications

The human being uses this type of energy in different applications, the most notorious are the electrical appliances that serve to optimize the communication Between people.

Medicine has also made great use of this type of energy by using ultrasound waves to create images of the human body, achieving an imitation of the organs that most absorb these waves: the thyroid ultrasound, for example, uses high-frequency sound waves that create an image of the gland thyroid. The reason for this use is that objects of different body hardness absorb sound energy in different ways.

Examples of acoustic or sound energy

1. The vibrations that are generated inside a box television.
2. Microphones, which transform acoustic energy into electrical energy.
3. Speakers, which transform electrical energy into acoustic energy.
4. The vibrations that a phone emits (not the vibration of a cell phone).
5. The energy emitted by mechanical vibrations.

Other types of energy

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