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A sound speed gradient leads to refraction of sound wavefronts in the direction of lower sound speed, causing the sound rays to follow a curved path. The radius of curvature of the sound path is inversely proportional to the gradient. [2] When the sun warms the Earth's surface, there is a negative temperature gradient in atmosphere.
In the atmosphere, vertical gradients of wind speed and temperature lead to refraction. [1] The wind speed is usually increasing with height, which leads to a downward bending of the sound rays towards the ground. The same holds if the temperature is increasing with height . If the temperature is decreasing with height and the wind speed is low ...
Environmental acoustics is the study of noise and vibrations, and their impact on structures, objects, humans, and animals. The main aim of these studies is to reduce levels of environmental noise and vibration.
Gradient noise is a type of noise commonly used as a procedural texture primitive in computer graphics. It is conceptually different from [ further explanation needed ] , and often confused with, value noise .
Noise in computer graphics refers to various pseudo-random functions used to create textures, including: Gradient noise, created by interpolation of a lattice of pseudorandom gradients Perlin noise, a type of gradient noise developed in 1983; Simplex noise, a method for constructing an n-dimensional noise function comparable to Perlin noise
Perlin noise is a type of gradient noise developed by Ken Perlin in 1983. It has many uses, including but not limited to: procedurally generating terrain , applying pseudo-random changes to a variable, and assisting in the creation of image textures .
Perlin noise is the earliest form of lattice noise, which has become very popular in computer graphics. Perlin Noise is not suited for simulation because it is not divergence-free. Noises based on lattices, such as simulation noise and Perlin noise, are often calculated at different frequencies and summed together to form band-limited fractal ...
Arts in education is an expanding field of educational research and practice informed by investigations into learning through arts experiences. In this context, the arts can include Performing arts education (dance, drama, music), literature and poetry, storytelling, Visual arts education in film, craft, design, digital arts, media and photography. [1]