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A pistonphone is an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. The principle relies on a piston mechanically driven to move at a specified cyclic rate, pushing on a fixed volume of air to which the microphone under test is coupled.
Boundary microphone (Audio-Technica ATM87R) A boundary microphone (or pressure zone microphone) is one or more small omnidirectional or cardioid condenser mic capsule (s) positioned near or flush with a boundary (surface) such as a floor, table, or wall. The capsule (s) are typically mounted in a flat plate or housing.
Together, these approximate the sound field on a sphere around the microphone; formally the first-order truncation of the multipole expansion. W {\displaystyle W} (the mono signal) is the zero-order information, corresponding to a constant function on the sphere, while X Y Z {\displaystyle XYZ} are the first-order terms (the dipoles or figures ...
The Parisian omission had a particular sting because New Zealand had just produced its best-ever Olympic performance. Measured on gold medals alone, New Zealand finished ahead of Canada and Spain ...
A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer, model 5150, employed a standard 2.25 inch magnetic driven (dynamic) speaker. [1] More recent computers use a tiny moving-iron or piezo speaker instead. [2] The speaker allows software and firmware to provide auditory feedback to a user ...
PowerPoint for the web is a free lightweight version of Microsoft PowerPoint available as part of Office on the web, which also includes web versions of Microsoft Excel and Microsoft Word. PowerPoint for the web does not support inserting or editing charts, equations, or audio or video stored on your PC, but they are all displayed in the ...
Microbial corrosion. Microbial corrosion, also called microbiologically influenced corrosion (MIC), microbially induced corrosion ( MIC ), or biocorrosion, is when microbes affect the electrochemical environment of the surface they are on. This usually involves building a biofilm, which can lead to either an increase in corrosion of the surface ...
Microsoft Corporation is an American multinational corporation and technology company headquartered in Redmond, Washington. [2] Its best-known software products are the Windows line of operating systems, the Microsoft 365 suite of productivity applications, the Azure cloud computing platform and the Edge web browser.