The thermal effect of the use of acoustic energy can also be solved heating or thermal therapy. American scientists have designed a refrigerator that relies on sound. The shape of a cylinder, cylinder outside the stacked fiberglass panels, cylinder filled with nitrogen or other sui gas; one end of the cylinder is closed, the other end is a vibrating diaphragm box, diaphragm box and the voice coil, wires and magnets are connected. When the sound waves act on the elastic diaphragm, forcing the expansion of the gas inside the cylinder, resulting in the generation of heat by the glass fiber rapidly conductive dissipation, thus achieving the purpose of cooling refrigeration.
Language pronunciation, singing and vocalization rely on acoustic energy to complete.
Ultrasound can change the charge of dust particles suspended in the atmosphere. Dust particles in the air to play ultrasound, can promote mutual adsorption between the dust particles gathered into larger particles and fall to the ground, so as to achieve the purpose of dust reduction and dust removal. U.S. scientists found that high-energy sound waves can promote the dust particles into one, due to increased weight and sinking, according to this principle, they developed a dust alarm, can be used for chimney dust, control of high temperature, high pressure, high corrosion of dust particles in the environment and eliminate air pollution.
Living organisms have different feelings about sound, for example, rats hate the 18 - 35 kHz frequency. People use electromagnetic waves and the principle of ultrasound invented to interfere with pests and other small animals to make them move away from the electronic mouse repellent, electronic mosquito repellent, electronic bird repellent and so on. Ultrasound on some of the results of early fruit trees and vegetables, regular broadcast ultrasound, but also to promote crop growth, so that the size of the larger, higher yields. Experiments have shown that tomatoes in the growing season after 30 times 100 decibels of sharp sound treatment, the yield can be increased by two times. Rice, soybeans, cucumbers and other crops, after the sonic treatment also received an increase in yield.
British scientists based on the energy contained in the propagation of sound waves in the barrier can be transformed into electricity, the rationale for the design and manufacture of a tympanic membrane-type acoustic wave receiving instrument, through the sound energy can be increased by connecting to the sound **** sounders, and the sound energy is rapidly converted into electricity, for some small electrical appliances.
In the United Kingdom, scientists have developed a new technology to sound control noise. The use of computers and sensors, the analog sound into digital signals and analyze them, in order to eliminate noise. Now, Britain, Japan, the United States, France and other countries, in a variety of luxury cars are installed in this system. The United States will also apply this technology to industrial air conditioners, exhaust fans, nuclear *** vibration imaging systems, high-power refrigerators and other fields
Some medical doctors use sound to diagnose certain diseases. When human tissues are subjected to external influences, the active molecules will show irregular fluctuations, and the body temperature of the parts will increase. At the same time, the more noise is emitted. The doctor can then use special, specialized equipment to accurately diagnose the exact location and extent of the lesion and inflammation.
The development of modern film and television technology, but also the emergence of sound instead of light to shoot underwater television technology. This is accomplished by means of an acoustic transmitter, a concave mirror, a television receiver and ancillary equipment. Shooting, sound waves from the transmitter, shot to the underwater target is reflected back by the concave mirror focusing, by the sound - electric camera tube converts the sound signal into electrical signals to the TV monitor, the CRT can be converted to electrical signals into the image is displayed. If you need long-term preservation, you can also use a video recorder to record, in order to play at any time. The use of sound waves to shoot underwater television images, but also color television images and three-dimensional television images, to achieve satisfactory results. Scientists at the Scripps Institution of Ocean Physics in California, United States, have also reportedly developed a method of visualizing the seabed using sound. Using underwater sound waves in the 8-80 kHz band, they displayed images of underwater experiments on the monitor screen. Moreover, this underwater object-acoustic system with computerized data-processing capabilities will make it possible to observe large animals, submarines and shipwrecks underwater.