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Perception of Sound Waves

Perception of Sound Waves

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 frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...

Sound as Pressure Waves

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...

Virtual Work

Virtual Work

The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...

Auditory Perception

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...

Perceiving Loudness, Pitch, and Location

Perceiving Loudness, Pitch, and Location

The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...

Sound Waves

Sound Waves

Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....

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Related Experiment Video

Updated: Oct 13, 2025

Photorealistic Learned Landscapes for Augmented Reality

Photorealistic Learned Landscapes for Augmented Reality

Published on: June 27, 2025

Materialising contexts: virtual soundscapes for real-world exploration.

Laurence Cliffe¹, James Mansell¹, Chris Greenhalgh¹

¹University of Nottingham, Nottingham, UK.

Personal and Ubiquitous Computing

|November 15, 2021

Summary

Audio augmented reality in museums enhances visitor engagement by connecting virtual sounds to physical objects. This technology sparks personal memories and encourages deeper learning about artifacts.

Keywords:

Audio augmented reality Cultural Experience Soundscape

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Area of Science:

Human-Computer Interaction
Museum Studies
Digital Heritage

Background:

Museums increasingly use digital technologies to engage visitors.
Audio augmented reality (AAR) offers new possibilities for interactive exhibits.
Understanding visitor interaction with AAR is crucial for effective implementation.

Purpose of the Study:

To explore the potential of AAR for enhancing museum engagement.
To analyze visitor interactions with a vintage radio augmented with virtual sound.
To investigate how AAR can foster exploration and knowledge acquisition.

Main Methods:

Practice-based design ethnography.
Thematic analysis of participant interactions with spatialized interactive audio.
Utilizing a vintage radio as an audio augmented artifact.

Main Results:

Identified a sequence of interactional phases in participants' engagement with AAR.
Demonstrated that AAR can engage visitors beyond line-of-sight limitations.
Observed that contextualized, embodied interactions evoked personal memories and interest in learning.

Conclusions:

Audio augmented artifacts can serve as interfaces for digital audio archives.
AAR can deepen visitor engagement and promote declarative knowledge acquisition.
Material objects, when augmented, can effectively contextualize immaterial digital content.