Physics Sound Waves and Longitudinal Waves

<p>Sound intensity relative to threshold hearing. (B)</p> Signup and view all the answers

<p>It creates regions of zero or diminished waves. (A)</p> Signup and view all the answers

<p>They cannot travel at all. (C)</p> Signup and view all the answers

<p>The density of the medium. (D)</p> Signup and view all the answers

<p>Particles move parallel to the direction of the energy transport. (A)</p> Signup and view all the answers

<p>The maximum displacement from equilibrium. (B)</p> Signup and view all the answers

<p>The wavelength decreases. (B)</p> Signup and view all the answers

<p>Surfaces of common phase that are spherical. (D)</p> Signup and view all the answers

<p>Aluminium (C)</p> Signup and view all the answers

<p>By compressions and rarefactions. (B)</p> Signup and view all the answers

<p>They exhibit spherical symmetry. (A)</p> Signup and view all the answers

<p>Modeling sound fields in acoustics. (D)</p> Signup and view all the answers

<p>They may produce echoes or reverberations. (D)</p> Signup and view all the answers

<p>Diffraction increases with increasing wavelength. (D)</p> Signup and view all the answers

<p>Comparable to the wavelength. (B)</p> Signup and view all the answers

<p>A change in direction accompanied by speed and wavelength changes. (C)</p> Signup and view all the answers

<p>A sound heard more than 0.1 seconds after the original sound. (B)</p> Signup and view all the answers

<p>They combine their energies to create interference patterns. (D)</p> Signup and view all the answers

Sound cannot travel in a vacuum because it is a mechanical wave that requires a medium for its propagation.

The distance between two successive crests or troughs of a wave.

The time it takes for one complete cycle of periodic motion to occur.

Compression happens when molecules are densely packed together, while rarefaction happens when they are distanced.

A longitudinal wave is a wave in which the motion of the medium's particles is parallel to the direction of the energy transport.

The maximum displacement of an object from its equilibrium position during a cycle of periodic motion.

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium from particle to particle.

The number of cycles described in one second.

The power per unit area carried by a sound wave. The higher the intensity, the larger the amplitude of sound wave oscillations.

The subjective perception of the frequency of a sound wave. A high pitch corresponds to a high frequency, and a low pitch corresponds to a low frequency.

A logarithmic measure of sound intensity. It is used to describe the relative loudness of sounds due to the human ear's large dynamic range.

The characteristic of sound that distinguishes different instruments or voices, even when playing the same note at the same loudness. It depends on the shape of the sound wave.

A measure of the variation in sound pressure. Larger amplitude means a louder sound.

A spherical wave is a wave that spreads out uniformly in all directions from a point source.

A coherent spherical wave maintains a constant phase relationship between different points on the wavefront.

Sound made by a loudspeaker or musical instrument can be modeled using spherical waves, which help us understand how sound travels and spreads.

Spherical waves are used in optics to model the behavior of light, including phenomena like diffraction and interference.

When a sound wave encounters a boundary, part of it is reflected back, while the other part passes through, impacting the new medium.

Echoes happen in large spaces, where sound waves travel longer distances and return later. Reverberations occur in smaller spaces with multiple reflections, creating a prolonged sound.

Diffraction is the bending of waves around obstacles or through openings, altering their direction. It becomes more prominent with longer wavelengths.

Refraction is a change in the direction of sound waves as they move between different mediums. This change is due to the varying speed and wavelength of sound in different materials.