What is an acoustic converter?
Acoustic converter is an electrical device that covers the vibration of sound waves into mechanical or electricity. They have various practical applications, including audio recording and audio playback. A specialized model, called an ultrasonic acoustic converter, can be used to measure distance from the object, as well as the weight of the object. They create electricity when moving parts inside the converter, such as electric plates or ribbons, are exposed to sound vibrations. The electricity produced inside the converter is first sent to the amplifier. The speaker reproduces the sound at the level that the human ear hears. The recording device retains information about the electrical signal. The recorder sends the stored signal to the remadiker during playback.
Ultrasonic acoustic converter can be used to measure the distance or weight of the object. The most common type is the piezoelectric acoustic converter. These include piezoelectric ceramic element that creates and distributes ultrasoundsound waves. The bath is usually water. The sound waves are reflected from the building and returns to the converter in the form of an echo. The time it needs to return these echoes to the converter is used to calculate the distance to the object.
Navigation and scope of underwater sounds (Sonar) is the common use of an ultrasonic acoustic converter. Sonar uses direction rays of sound waves. This allows the Sonar operator to determine the direction and distance to the object.
Sonar systems can be active or passive. Active System sends sound waves and listens to echoes. The passive system listens to sounds created by ships, fish and mainland.
Electromagnetic acoustic converter (EMAT) is another form of ultrasonic converter. Instead of a ceramic element, the main part of EMAT. It is a type of non -contact or non -destructive converter. Unlike piezoelectric converters EMATS do not need to carry audioH waves of clutches. Instead, two electromagnetic fields are generated for reimbursement of ultrasonic waves.
Emats can be easily used almost anywhere, because no fluid is needed. For example, EMATS can be used to check deficiencies in underground pipes. The disadvantage for EMATS, compared to piezoelectric converters, is that Emats create weaker sound fields.