Salford Acoustics is a consulting firm that specializes in acoustics, noise, vibration, and environmental assessments. Typically, such firms provide services related to architectural acoustics, environmental noise assessments, sound insulation, and vibration analysis for a variety of projects, including residential, commercial, and industrial developments. The company may work on projects like acoustic design for buildings, noise impact assessments for new developments, and providing expert advice on minimizing noise pollution.
The "scale of harmonics" generally refers to a system of musical tuning and scales based on harmonic series and their relationships. In music theory, harmonics are overtones or frequencies that are integer multiples of a fundamental frequency. The harmonic series starts with the fundamental frequency (the first harmonic) and continues with higher frequencies, which are the second harmonic (2 times the fundamental), third harmonic (3 times the fundamental), and so on.
In acoustics, the term "sweet spot" refers to a specific location within a listening environment where sound quality is optimized. This spot is typically where the listener experiences the best balance of sound characteristics, such as clarity, volume, and spatial imaging.
A Sound Retrieval System (SRS) typically refers to a technology or process used to enhance audio playback and improve sound quality for various applications, including music, movies, and gaming. It often involves algorithms and signal processing techniques designed to create a more immersive and lifelike audio experience. In a broader sense, SRS can also pertain to systems that manage and retrieve sound data for various purposes, such as audio libraries, digital asset management, or even machine learning applications that involve audio analysis and classification.
Sound Amplification by Stimulated Emission of Radiation (SASER) is a process that is analogous to the operation of a laser, but instead of light, it amplifies sound waves. The concept of SASER is based on the principle of stimulated emission, which is the fundamental principle behind laser technology. In a SASER, a medium (often a crystal or a gas) is energized to create a population inversion, where more particles are in an excited state than in the lower energy state.
A sound generator is a device or software that produces sounds or audio signals. Sound generators can be used in various applications, including music production, sound design, environmental sound creation, and acoustic research. They can create a wide range of sounds, from simple waveforms like sine, square, and triangle waves to complex sounds that mimic real instruments or environmental noises. Here are a few types of sound generators: 1. **Analog Synthesizers**: These use analog circuitry to generate sound waves.
Spectral splatter refers to an artifact that can occur in digital signal processing, particularly in the context of audio and image processing. It describes the unintended spreading or smearing of signal components across the frequency spectrum, typically due to nonlinearities, quantization errors, or insufficient sampling rates. In audio processing, for example, spectral splatter can manifest when certain frequencies interact in ways that produce unwanted harmonics or overtones, often as a result of dynamic range compression, distortion effects, or clipping.
Throat singing, also known as overtone singing, is a vocal technique that allows a singer to produce multiple pitches simultaneously. It is characterized by a fundamental pitch (the main tone) alongside one or more overtones that are shaped by resonating in the throat, mouth, and other parts of the vocal tract. This unique singing style is practiced in various cultures around the world, with notable traditions in Mongolia and Tuva, where it is often referred to as "Hoomii".
Acoustoelastography is a medical imaging technique that combines ultrasound and elastography to assess the mechanical properties of tissues, particularly their elasticity and stiffness. This method provides valuable information about tissue characteristics, which can aid in the diagnosis and monitoring of various conditions, particularly in oncology (e.g., tumor characterization) and liver fibrosis assessment. The key components of acoustoelastography include: 1. **Ultrasound Imaging**: Provides real-time imaging of tissues to visualize structure and morphology.
A tuning fork is a metallic instrument that produces a specific pitch when struck. It consists of a U-shaped fork with two prongs and is typically made of steel. When the fork is struck against a surface, it vibrates and creates sound waves at a precise frequency, which is determined by the length and mass of the prongs.
Visual Reinforcement Audiometry (VRA) is a behavioral audiological assessment technique primarily used to evaluate hearing in infants and young children who are typically aged between six months and two to three years. The purpose of VRA is to determine the child’s ability to hear and respond to sounds at various frequencies and intensities. In a typical VRA procedure, the child is seated in a sound-treated room, and sounds (usually beeps or tones) are presented through speakers or headphones.
Wildlife acoustics is a field of study that focuses on the sounds produced by animals and their implications for understanding wildlife behavior, ecology, and conservation. This area encompasses the analysis of animal vocalizations, such as calls, songs, and other sounds, which can provide insight into communication, mating behavior, territoriality, and social interactions among species.
The Journal of Theoretical and Computational Acoustics is a scientific journal that focuses on research related to the theoretical and computational aspects of acoustics. This includes the study of sound propagation, acoustic modeling, and simulations, among other topics. The journal serves as a platform for researchers and academics to publish their findings, share innovative methodologies, and discuss advancements in the field of acoustics.
The Mechanical Index (MI) is a measurement used mainly in the field of ultrasound, specifically in diagnostic imaging. It quantifies the potential for mechanical bioeffects caused by ultrasound waves in tissues. The MI is calculated based on the peak negative pressure of the ultrasound beam and its frequency. The Mechanical Index is particularly relevant in assessing the safety of ultrasound exposure. A higher MI indicates a greater potential for inducing cavitation and other mechanical effects, while a lower MI suggests a lower risk of such effects.
Noise weighting refers to the process of adjusting or filtering audio signals to account for the perceived loudness of different frequency components in the presence of background noise. This concept is often applied in various fields, including audio engineering, telecommunications, and environmental noise analysis. Here are some key points about noise weighting: 1. **Frequency Sensitivity**: Human hearing is not equally sensitive to all frequencies.
The Acoustic Contrast Factor (ACF) is a parameter used in underwater acoustics to describe the difference in acoustic properties between two media, typically water and an object or a target submerged in it. It is essentially a measure of how distinct the acoustic signature of the target is compared to its surrounding environment. The ACF takes into account factors such as: 1. **Density**: Differences in the densities of the target and the surrounding medium (usually water) affect how sound waves propagate through them.
Acoustic lubrication is not a widely recognized term in mainstream scientific literature, but it can refer to the use of sound waves or acoustic energy to reduce friction and improve the lubrication process in various materials and systems. The concept is primarily associated with the field of tribology, which is the study of friction, wear, and lubrication.
Acoustic radiation pressure is the force exerted by sound waves on a surface due to the momentum carried by the sound. When sound waves propagate through a medium (such as air, water, or any other fluid), they create variations in pressure that can exert a net force on objects within that medium. This phenomenon is a consequence of the energy and momentum transfer associated with the oscillatory motion of the sound waves.
The Harish-Chandra class is a concept from representation theory, particularly in the context of the representation theory of semisimple Lie groups and Lie algebras. It refers to a specific class of representations, known as "Harish-Chandra modules," which arise when studying the decomposition of representations into irreducible components.
Critical distance refers to a concept used in various fields, including psychology, sociology, and geography, but its meaning can differ depending on the context. Here are a few interpretations based on different disciplines: 1. **Psychology & Sociology**: In the context of personal relationships or social interaction, critical distance may refer to the optimal emotional or physical distance necessary for maintaining healthy interactions or connections.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact