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From the pinna, the sound waves move into the ear canal (also known as the external acoustic meatus) a simple tube running through to the middle ear. This tube leads inward from the bottom of the auricula and conducts the vibrations to the tympanic cavity and amplifies frequencies in the range 3 kHz to 12 kHz.
The canals of the United Kingdom are a major part of the network of inland waterways in the United Kingdom. They have a varied history, from use for irrigation and transport, through becoming the focus of the Industrial Revolution, to today's role of recreational boating. Despite a period of abandonment, today the canal system in the United ...
17th Street Canal. Coordinates: 30°00′41″N 90°07′19″W. A woman walks her dog along the levee beside the flood wall on the Metairie side of the canal, November 11, 2005. In the background to the right, ongoing repairs in the breach on the New Orleans side can be seen. The 17th Street Canal is the largest and most important drainage ...
Bone conduction. Bone conduction is the conduction of sound to the inner ear primarily through the bones of the skull, allowing the hearer to perceive audio content even if the ear canal is blocked. Bone conduction transmission occurs constantly as sound waves vibrate bone, specifically the bones in the skull, although it is hard for the ...
Suez Canal Authority. / 30.58833°N 32.28250°E / 30.58833; 32.28250 ( Suez Canal Authority headquarters, Ismaïlia) Suez Canal Authority ( SCA) is an Egyptian state-owned authority which owns, operates and maintains the Suez Canal. It was set up by the Egyptian government to replace the Suez Canal Company in the 1950s which ...
The Duluth Ship Canal is an artificial canal cut through Minnesota Point, providing direct access to Duluth harbor from Lake Superior. Begun privately in 1871, it was put under federal supervision and maintenance several years later. It is still an important component of the harbor facilities. In its current configuration, the canal is defined ...
A glomus jugulare tumor is a tumor of the part of the temporal bone in the skull that involves the middle and inner ear structures. This tumor can affect the ear, upper neck, base of the skull, and the surrounding blood vessels and nerves. A glomus jugulare tumor grows in the temporal bone of the skull, in an area called the jugular foramen.
Headphones are a pair of small loudspeaker drivers worn on or around the head over a user's ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby ...