acoustic absorption material

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• Acoustic quieting — This article primarily discusses mechanical and acoustic noise. See Noise reduction for electronic noise. : For noise masking by saturation, see Sound masking or pink noise.Acoustic quieting is the process of making machinery quieter by damping… …   Wikipedia

• Absorption (acoustics) — Absorption refers to the absorption of sound waves by a material. The absorption is the missing piece , when comparing the total reflected and transmitted energy with the incident energy. It is the property of a material that changes acoustic… …   Wikipedia

• Acoustic microscopy — Introduction = Acoustic microscopes employ very high or ultra high frequency ultrasound. These microscopes operate nondestructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks,… …   Wikipedia

• Absorption coefficient — The absorption coefficient α is a property of a material. It defines the extent to which a material absorbs energy, for example that of sound waves or electromagnetic radiation. Wallace Sabine was a pioneer of this concept in acoustics and… …   Wikipedia

• absorption — /ab sawrp sheuhn, zawrp /, n. 1. the act of absorbing. 2. the state or process of being absorbed. 3. assimilation; incorporation: the absorption of small farms into one big one. 4. uptake of substances by a tissue, as of nutrients through the… …   Universalium

• Acoustic board — An acoustic board is a special type board made of sound absorbing materials. Their job is to provide sound insulation.cite book |author= |authorlink= |editor= |others= |title=Dictionary of architectural and building technology |edition= |language …   Wikipedia

• Absorption coefficients of common materials at several frequencies — ▪ Table Absorption coefficients of common materials at several frequencies frequency (hertz) material 125 250 500 1,000 2,000 4,000 concrete 0.01 0.01 0.02 0.02 0.02 0.03 plasterboard 0.20 0.15 0.10 0.08 0.04 0.02 acoustic board 0.25 0.45 0.80… …   Universalium

• Cork (material) — Untreated cork panel …   Wikipedia

• undersea exploration — Introduction       the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments       Included in the scope of undersea exploration are the physical and chemical… …   Universalium

• Drum screen — A drum screen, sometimes referred to as a drum shield or acoustic shield, is a tool used by audio engineers to avoid the sound control problems caused when louder instruments overwhelm quieter instruments and vocals on stage. It is a transparent… …   Wikipedia

• Medical ultrasonography — This article is about using ultrasound to image the human body. For imaging of animals in research, see Preclinical imaging. Sonography redirects here. For the tactile alphabet called sonography , see Night writing. Medical ultrasonography… …   Wikipedia