physical noise
11Noise phobia in dogs — Dog Noise Phobia, along with Dog Noise Anxiety, are terms sometimes used by dog owners and veterinarians to describe canine fear of and the corresponding stress responses to loud noises. Noise related phobia are common in dogs, and may be… …
12Noise reduction — For sound proofing, see soundproofing. For scientific aspects of noise reduction of machinery and products, see noise control. Noise reduction is the process of removing noise from a signal. All recording devices, both analogue or digital, have… …
13Noise pollution — A Boeing 747 400 passes close to houses shortly before landing at London Heathrow Airport Noise pollution is excessive, displeasing human, animal or machine created environmental noise that disrupts the activity or balance of human or animal life …
14Noise (electronics) — Electronic noise [1] is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects. Thermal noise is… …
15Noise map — A noise map is a graphic representation of the sound level distribution existing in a given region, for a defined period. Contents 1 Directive 2002/49/EC 2 Production of noise maps 3 Noise mapping using simulation tools …
16Noise control — This article is about the scientific aspects of noise control. For the anti social concept of noise control, see Loud music. Noise control is an active or passive means of reducing sound emissions, often incentivised by personal comfort,… …
17Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
18Physical optics — In physics, physical optics, or wave optics, is the branch of optics which studies interference, diffraction, polarization, and other phenomena for which the ray approximation of geometric optics is not valid. This usage tends not to include… …
19noise — background ack ground , n. [Back, a. + ground.] [1913 Webster] 1. Ground in the rear or behind, or in the distance, as opposed to the {foreground}, or the ground in front. [1913 Webster] 2. (Paint.) The space which is behind and subordinate to a …
20physical interference — Broadly, any physical obstruction of movement. In a technical sense, an injury to or a disturbance of land from a physical aspect, as distinguished from a disturbance constituting annoyance or other discomfort of a mental nature and personal to… …
