acoustical ceiling system
41Active noise control — (ANC) (also known as noise cancellation, active noise reduction (ANR) or antinoise) is a method for reducing unwanted sound. Contents 1 Explanation 2 Applications 3 See also 4 …
42Ikara (missile) — Infobox Weapon is missile=yes caption=Ikara missile on launcher name=Ikara type=Anti submarine origin=Australia era=1960s launch platform=Ship borne target=Submarines manufacturer=Australian Government Aircraft Factories/Commonwealth Aircraft… …
43Cathedral of Saint Mary of the Immaculate Conception in Indiana — The Cathedral of Saint Mary of the Immaculate Conception is a cathedral of the Roman Catholic Diocese of Lafayette in Indiana. It is the seat of the bishop of the Diocese of Lafayette in Indiana.Cathedral HistoryIn 1843, a small group of Catholic …
44Static inverter plant — A static inverter station, also known as an HVDC Converter Station, is the terminal equipment for a high voltage direct current transmission line, in which direct current is converted to three phase alternating current, and, usually, the reverse …
45A.R.T. Studios — is the private music studio of music producer Michael Cretu, located in his mansion in the hills of Ibiza, Spain.This studio was designed and built by Gunter Wagner and Bernd Steber (Sydney/Australia) and is used in the recording of all of Cretu… …
46Music Hall (Cincinnati) — Cincinnati Music Hall U.S. National Register of Historic Places U.S. National Historic Landmark …
47Greenwich Academy — Infobox School2 | name = Greenwich Academy established = 1827 type = Independent, Non sectarian head name = Head head = Molly H. King city = Greenwich state = Connecticut country = USA campus = convert|39|acre|km2 faculty = 134 students = 790… …
48Room acoustics — describes how sound behaves in an enclosed space.The way that sound behaves in a room can be broken up into roughly four different frequency zones: *The first zone is below the frequency that has a wavelength of twice the longest length of the… …
49Echo chamber — For metaphorical echo chambers in media, see Echo chamber (media). Echo chamber of the Dresden University of Technology …
50Salt Lake Tabernacle — Coordinates: 40°46′13″N 111°53′35″W / 40.7704°N 111.8930°W / 40.7704; 111.8930 The Salt Lake Tabernacle, also known as the Mo …
