sound pressure level
41Speed of sound — Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time. In SI Units with dry air at 20 °C (68 °F), the speed of sound is 343 m/s. This… …
42Non-invasive intracranial pressure measurement methods — Increased intracranial pressure (ICP) is one of the major causes of secondary brain ischemia that accompanies a variety of pathological conditions, most notably, traumatic brain injury (TBI), stroke, and intracranial hemorrhages. However, aside… …
43Analog sound vs. digital sound — Analog sound versus digital sound compares the two ways in which sound is recorded and stored. Actual sound waves consist of continuous variations in air pressure. Representations of these signals can be recorded in either digital or analog… …
44musical sound — Introduction any tone with characteristics such as controlled pitch and timbre. The sounds are produced by instruments in which the periodic vibrations can be controlled by the performer. That some sounds are intrinsically musical,… …
45Blood pressure — For information about high blood pressure, see Hypertension. Blood pressure Diagnostics A sphygmomanometer, a device used for measuring arterial pressure. MeSH …
46Puget Sound environmental issues — articleissues POV = December 2007 copyedit = January 2007 citationstyle = October 2008The environmental health of Puget Sound, Washington has a diverse and complex history related to a long, involved relationship with marine and freshwater… …
47Positive airway pressure — A typical CPAP machine houses the air pump in a case lined with sound absorbing material for quieter operation. A hose carries the pressurized air to a face mask or nasal pillow …
48No Pressure (film) — No Pressure Promotional bann …
49Standard conditions for temperature and pressure — Not to be confused with Standard state. In chemistry, standard condition for temperature and pressure (informally abbreviated as STP) are standard sets of conditions for experimental measurements, to allow comparisons to be made between different …
50King George Sound — is the name of a sound on the south coast of Western Australia. Located at coord|35|02|S|117|56|E,cite web | title = King George Sound | url = http://www.ga.gov.au/bin/gazd01?rec=272038 | work = [http://www.ga.gov.au/map/names/ Gazetteer of… …
