Diaphragm

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Diaphragm (Ancient Greek: διάφραγμα diáphragma “partition”) may refer to any of the following:

Optics and photography

• Diaphragm (optics), a stop in the light path of a lens, having an aperture that regulates the amount of light that passes
• Diaphragm shutter, a type of leaf shutter consisting of a number of thin blades in a camera

Acoustics

• Diaphragm (acoustics), a thin, semi-rigid membrane that vibrates to produce or transmit sound waves

Anatomical structure

• Thoracic diaphragm, a thin sheet of muscle under the lungs
• Pelvic diaphragm, also called pelvic floor, a pelvic structure
• Urogenital diaphragm, also called the triangular ligament, a pelvic structure

Other

• Diaphragm (contraceptive), a small rubber dome placed in the vagina to wall off the cervix, thus preventing sperm from entering
• Diaphragm (mechanical device), a sheet of a semi-flexible material anchored at its periphery
• Diaphragm seal, a membrane that seals an enclosure
• Diaphragm pump, a type of pump
• Diaphragm arch, a type of arch
• Diaphragm wall, a type of wall
• Diaphragm valve, a type of valve
• Diaphragm (structural system), a structural engineering system used to resist lateral loads
• Diaphragm, another name for a separator in electrochemical systems.
• Diaphragma a genus of algae.
• Diaphragm, an accordionlike device enclosing a gangway connection between two railway coaches/cars

See also

• Lamina
• Membrane

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