Ultrasonic and Sound Waves Quiz

Sound waves with frequencies higher than the human audible range (above 20,000 Hz).

Ultrasound has frequencies higher than those of audible sound

Sound waves with frequencies lower than the human audible range (below 20 Hz).

Different animals detect different ranges of sound. Bats and dolphins, for example, can hear ultrasonic frequencies.

Ultrasound waves have high energy content, reflect, refract and absorb, and have negligible diffraction.

A longitudinal wave that is a form of energy emitted from a vibrating body.

A wave where the particles move parallel to the direction of wave propagation.

Sound waves can be classified into three groups based on frequency; infrasound, audible sound and ultrasound.

Methods like magnetostriction and piezoelectric effects generate ultrasonic waves.

A method to produce ultrasonic waves by generating an alternating magnetic field that causes a ferromagnetic rod to vibrate.

Materials like iron or nickel that exhibit magnetism.

An electrical circuit that vibrates at a specific frequency when a signal is applied, used to amplify oscillation.

Stationary ultrasonic waves in a liquid that act as a diffraction grating.

Widely used in medicine, industry, military, and civilian sectors for imaging, detection, and navigation.

The natural frequency of a vibrating rod is determined by its length, Young's modulus, and density.

Another method for generating ultrasonic waves by applying electric fields to crystals which cause them to vibrate.

Applying an electric field to a piezoelectric crystal causes it to change shape.

Materials exhibiting the piezoelectric effect include quartz, barium titanate, lead zirconate, and ammonium dihydrogen phosphate.

A quartz crystal plate cut perpendicular to the x-axis, used for generating and detecting longitudinal ultrasonic waves.

A quartz crystal plate cut perpendicular to the y-axis, used for generating and detecting transverse ultrasonic waves.

A method using a transformer and piezoelectric crystal to generate ultrasonic waves.

A resonant circuit consisting of a coil (L1) and a variable capacitor (C1) that determines the frequency of the oscillator.

The transformer, with a primary (L1 and L2) and a secondary (L3), transfers energy from the electronic oscillator circuit to the piezoelectric crystal.

An electronic circuit that produces high-frequency sound waves (ultrasound) using a vibrating quartz crystal. The crystal's frequency is determined by its size and material properties.

Producing high-frequency sound waves (ultrasound) through the vibration of a piezoelectric material. The frequency depends on the material properties and the size of the piezoelectric element.

A glass tube filled with air and powder. When ultrasonic waves are passed through it, the powder gathers at areas of low vibration (nodes) and disperses at areas of high vibration (antinodes).

Detecting ultrasonic waves by observing the behavior of a narrow flame. The flame remains steady at areas of low vibration (nodes) and flickers at areas of high vibration (antinodes).

A device that uses the piezoelectric effect to detect ultrasonic waves. When ultrasound waves hit a piezoelectric material, it generates a voltage that can be amplified and used to detect the sound.

The process of detecting and measuring high-frequency sound waves (ultrasound) using methods like the piezoelectric detector, Kundt's tube, or sensitive flame.

A process that uses high-frequency sound waves to melt solder and remove oxide layers on aluminum surfaces, allowing for strong and clean solder joints.

A method using high-frequency sound waves to remove contaminants from parts like intricate machine components, electronic assemblies, and delicate watches.

SOund Navigation And Ranging. A method using sound waves to detect and locate underwater objects.

By emitting a sound wave and timing how long it takes for the reflected wave to return, the distance to the object is calculated.

An imaging technique using high-frequency sound waves to visualize muscles and internal organs, showing their size, structure, and any abnormalities.

A device that detects the intensity of a crash using ultrasonic waves and triggers the airbag to deploy.

A method using high-frequency sound waves to disperse fog by causing water droplets to coalesce and fall to the ground.

Piezoelectricity is considered green energy because it generates electricity from mechanical vibrations without producing harmful emissions.

Non-Destructive Testing. It refers to a set of techniques used to assess the integrity of materials or structures without causing damage.

Ultrasonic waves are used to detect internal flaws or defects in materials like cracks, holes, or weak spots. The waves reflect off these defects, providing information about their location and size.

By sending ultrasonic waves into a material and measuring the time it takes for the reflected waves to return, we can pinpoint the location of any flaws within the material.

Ultrasonic waves are used to drill holes in very hard materials, such as glass or diamonds, by vibrating a tool tip.

Slurry, a thin paste containing abrasive particles like carborundum powder, is used in ultrasonic drilling. It helps to erode the material being drilled.

Aluminum cannot be directly soldered using traditional methods. Ultrasonic soldering helps overcome this issue by using vibrations to melt the solder and join the pieces.

This method uses a fine platinum wire to sense changes in temperature caused by ultrasonic waves. The wire's resistance fluctuates due to compression and rarefaction of the medium, indicating the presence of antinodes.

A node is a point in a medium where the amplitude of the wave is zero, meaning there is no displacement of particles. In simple terms, it's a point of no movement.