Technology / Home Audio / Dispersion: The extent to which a sound emitter yields acoustic radiation over a given area. This is a particular concern in tweeters and midranges whose portion of the audio spectrum has a much more directional character than woofers. Many Horn tweeters, while very energetic, have a more limited area of dispersion within which their effect can be fully perceived. Generally, Dome tweeters can be heard over a much wider area, all other factors being equal. But each particular example must be assessed individually for this factor. Some radiator designs are better than others.

Thorium (Th)

Science / Periodic Table of Elements / Thorium (Th): Atomic number: 90, Atomic mass: 232.04 g.mol -1, Electronegativity: 1.3, Density: 11.72 g.cm-3 at 20°C, Melting point: 1750 °C, Boiling point: 4790 °C, Vanderwaals radius: 0.182 nm, Ionic radius: 0 MORE

Silicon (Si)

Science / Periodic Table of Elements / Silicon (Si): Atomic number: 14, Atomic mass: 28.0855 g.mol -1, Electronegativity: 1.8, Density: 2.33 g.cm -3 at 20 °C, Melting point: 1410 °C, Boiling point: 3265 °C, Vanderwaals radius: 0.132 nm, Ionic radius: MORE

Standard Deviation

Science / Chemistry / Standard Deviation: The standard deviation is a statistical measure of precision. The best estimate of the standard deviation s for small data sets is calculated using formula for standard deviation where xi is the measu MORE