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tym·pan·ic mem·brane

[TA]
a thin tense membrane forming the greater part of the lateral wall of the tympanic cavity and separating it from the external acoustic meatus; it constitutes the boundary between the external and middle ears; it is a trilaminar membrane covered with skin on its external surface, mucosa in its internal surface, is covered on both surfaces with epithelium, and, in the tense part, has an intermediate layer of outer radial and inner circular collagen fibers.

drum

(drŭm)
n.
Anatomy The eardrum.

tym·pan·ic mem·brane

(tim-pan'ik mem'brān) [TA]
A thin, tense covering that forms the greater part of the lateral wall of the tympanic cavity and separates it from the external acoustic meatus; it constitutes the boundary between the external and middle ear, is covered on both surfaces with epithelium, and in the tense part has an intermediate layer of outer radial and inner circular collagen fibers.
Synonym(s): membrana tympani [TA] , drum membrane, drum, drumhead, eardrum, myringa, myrinx.
[L. membrana tympani]
References in periodicals archive ?
Compared to the alternatives of a vacuum cleaning system or the changeover and disposal problems of conventional paper media, Paul said the magnetic drum systems savings and benefits are substantial.
Magnetic Drum Separators provide the most efficient means of extracting small and fine iron contamination from a continuous flow of free-flowing material, such as beans, nuts, rice, etc.
With this the mix of media and ceramic is guided as a thin curtain between two extra wide magnetic drums. The high magnetic force of the permanent magnets placed inside the drums separates the ferritic blast media from the ceramic with 99% efficiency.
Products include magnetic drums, plates, pulleys, and overhead magnets suspended above conveyors.
Products featured in the brochure include E-Z Tec DSP metal detectors, E-Z Tec 9100 metal separators, Metalarm metal grate magnets, PolyMag resin separators, rare earth roll separators, PolyMag additives, round pipe magnetic separators, RF (radial field) cartridge magnets, magnetic drums, vibratory conveyors, feeders and screeners, volumetric feeder machines and bin vibrators, and more.
This was followed by punched paper tape, magnetic drums, magnetic disk packs, 8" floppy disks, 5 1/4" floppy disks, 3 1/2" diskettes and USB memory drives.
Walker Magnetics manufactures magnetic pulleys, suspended magnets, magnetic drums and eddy current separators for the recycling industries.
Then there's Toyoda Machine Works Ltd., a major pioneer whose commitment dates back to the 1970s when it developed a machine for mainframe computers' magnetic drums, says Toshiyuki Yamada of the Japan Society for the Promotion of Machine Industry (Tokyo).
Self-cleaning magnetic drums and drum separators provide continuous removal of ferrous contaminants from a wide range of free-flowing bulk and granular materials in high-volume applications.