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A loudspeaker enclosure based on the concept was proposed in October 1965 by Dr A.R. Bailey in Wireless World magazine, referencing a production version of an acoustic-line enclosure design from Radford Electronics Ltd. [16] The article postulated that energy from the rear of a driver unit could be essentially absorbed, without damping the cone ...
The enclosure or driver must have a small leak so that the internal and external pressures can equalise over time, to compensate for changes in barometric pressure or altitude; the porous nature of paper cones, or an imperfectly sealed enclosure, is normally sufficient to provide this slow pressure equalisation.
Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor use, but type 5 is not. A NEMA enclosure rating does not mean that it also meets the same UL enclosure rating. [2]
A chart of accounts (COA) is a list of financial accounts and reference numbers, grouped into categories, such as assets, liabilities, equity, revenue and expenses, and used for recording transactions in the organization's general ledger.
Monthly accounting periods are common. In financial accounting the accounting period is determined by regulation and is usually 12 months. The beginning of the accounting period differs according to jurisdiction. For example, one entity may follow the calendar year, January to December, while another may follow April to March as the accounting ...
Morgan Geyser, one of the two assailants in the 2014 Slender Man stabbing case, will be released from a mental health facility, a judge ruled Thursday. Waukesha County Circuit Judge Michael Bohren ...
3. San Francisco. San Francisco, a hub for innovation and tech, takes the third spot on the list. ... Author unpacks the meaning of 'true wealth' in new book. News. News. USA TODAY.
The codification allows a free basic view or paid professional view to the public. The professional view requires an annual subscription up to $940 depending on concurrent users. [3] Discounts may apply to multiple concurrent users. [4] The codification is used by accounting and reporting professionals, analysts and investors.