Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the…

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal…

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different…

Most solids and liquids are incompressible—their densities remain constant throughout. In the presence of an external force, the molecules tend…

The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly…

As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two…

The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium…

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of…

The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity.…

Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure…

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the…

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical…

The study of music provides many examples of the superposition of waves and the constructive and destructive interference that occurs. Very few…

The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted…

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based…

While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than…

The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart.…

A growing number of electrochemical technologies depend on fluid flow, and often that fluid is opaque. Measuring the flow of an opaque fluid is…

By focusing low-intensity ultrasound pulses that penetrate soft tissues, LIPUS represents a promising biomedical technology to remotely and safely…

Surface acoustic waves (SAWs) can be used to drive liquids in portable microfluidic chips via the acoustic counterflow phenomenon. In this video we…