Expert Answer:

• Ultrasonic vibrations are used for :
• (i) Welding metals having high melting point.
• (ii) Scanning of various organs of human body.
• (iii) Insects and rats repellant.

How is ultrasound used in industry?

Ultrasound can be used in industry to detect defects in metals. Materials can be tested for internal faults and cracks that could lead to the failure of a structure under certain conditions. Ultrasound imaging provides a quick method of detection and perhaps prevents serious accidents.

What are three uses for ultrasonic waves?

Ultrasonic waves are used for the following purposes.

• Ultrasonic flaw detection.
• Cutting and matching of hard materials.
• Ultrasonic soldering and welding.
• Measurement of flow devices.
• Applications in medicine.
• Thermal effect.
• Ultrasonic as means of communication.

  Where are ultrasonic waves used in everyday life?

  Ultrasonic Cleaning Materials like glass, metals, and ceramics can be cleaned using this and in addition to that, ultrasonic waves can be used to remove grease, oil and dirt. Ultrasonic sound waves are also used in industries in order to get rid of chips and oil from machinery and other industrial equipments.

  What makes ultrasonic sound?

  Ultrasonic sound can be produced by transducers which operate either by the piezoelectric effect or the magnetostrictive effect. The magnetostrictive transducers can be used to produce high intensity ultrasonic sound in the 20-40 kHz range for ultrasonic cleaning and other mechanical applications.

  How does ultrasonic cleaning work?

  Ultrasonic cleaning works through high-frequency sound waves transmitted through liquid to scrub clean the surface of immersed parts. The high-frequency sound waves, typically 40 kHz, agitate the liquid solution of water or solvent, and cause the cavitation of solution molecules.

  Is ultrasound harmful to humans?

  Safety. Occupational exposure to ultrasound in excess of 120 dB may lead to hearing loss. Exposure in excess of 155 dB may produce heating effects that are harmful to the human body, and it has been calculated that exposures above 180 dB may lead to death.

  How ultrasound is used in medicine?

  In medicine, ultrasound is used to detect changes in the appearance of organs, tissues, and vessels and to detect abnormal masses, such as tumors. In an ultrasound exam, a transducer both sends the sound waves and records the echoing waves.

  Are ultrasonic waves harmful to humans?

  Although Ultrasound cannot be heard by humans, at high decibels it can still cause direct damage to human ears. Ultrasound in excess of 120 decibels may cause Hearing damage. Exposure to 155 decibels causes heat levels that are harmful to the body. 180 decibels may even cause death.

  Why ultrasonic waves are used in sound ranging?

  Ultrasonic Waves are used as they can penetrate deep in water without losing intensity. Because their frequency lies beyond the limits of audibility (20Hz—20,000Hz). One of the application of the sound ranging is to locate the position of the object underwater and to find the depth of the sea.

  How are ultrasonic vibrations used in everyday life?

  State four practical uses of ultrasonic vibrations. These are used for dissipating fogs on the runways at the airports. These are used in the ultrasound scanning of internal organs of human body. These are used for making dish washing machines. In these machines, water and detergents are vibrated with ultrasonics vibrator.

  How are ultrasonic waves used in industrial applications?

  Thus, ultrasonic surface waves of frequency 2.5 Mc/s can detect fractures 0.05 mm in depth up to a distance of 60 cm. Ultrasonic surface waves are used for detection of fatigue fractures in the blades of turbines and compressors, for testing of aluminum sheets used in aircraft, etc.

  How big is the frequency of an ultrasonic wave?

  Thus; ultrasonic waves are sound waves of frequencies above 20,000 c/s. By using modern methods of generation, it has become possible to produce ultrasonic wave vibrations up to frequencies of about 5 x 10 5 c/s.

  How are ultrasonic waves used to detect flaws?

  Testing of materials for flaw detection by ultrasonic waves is being widely used. The piezoelectric generator is the most common type of generator for producing ultrasonic waves which converts high-frequency electrical oscillations into mechanical oscillations.