Diffuser may refer to:

Aerodynamics

Diffuser (automotive) A diffuser, in an automotive context, is a shaped section of the car rear which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of t ...

, a shaped section of a car's underbody which improves the car's aerodynamic properties * Part of a jet engine air intake, especially when operated at supersonic speeds * The channel between the vanes of the stator of a

centrifugal compressor Centrifugal compressors, sometimes called impeller compressors or radial compressors, are a sub-class of dynamic axisymmetric work-absorbing turbomachinery. They achieve pressure rise by adding energy to the continuous flow of fluid through th ...

Other uses

* Sound diffuser, a device that scatters reflections of sound across frequencies * Diffuser (band), a punk rock band from New York, U.S. * Diffuser (breathing set part), a device fitted over an underwater breathing set's exhaust orifice to break up the gas outflow * Diffuser (hair), a

blowdryer A hair dryer (the handheld type also referred to as a blow dryer) is an electromechanical device that blows ambient air in hot or warm settings for styling or drying hair. Hair dryers enable better control over the shape and style of hair, by a ...

attachment that diffuses heat as it dries the hair *

Diffuser (heat) A heat diffuser, flame tamer, or simmering plate (UK) is a cooking utensil that is placed on top of a burner on a cooktop to separate the cooking pot or pan from the direct source of heat, making the heat more gentle and even. See also * Bru ...

, a cooking item that is placed above a heating element to separate the cooking utensil from the heat source *

Diffuser (optics) In optics, a diffuser (also called a light diffuser or optical diffuser) is any material that diffuses or scatters light in some manner to transmit soft light. Diffused light can be easily obtained by reflecting light from a white surface, wh ...

, a device that spreads out or scatters light *

Diffuser (sewage) An air diffuser or membrane diffuser is an aeration device typically in the shape of a disc, tube or plate, which is used to transfer air and with that oxygen into the sewage or industrial wastewater Wastewater (or waste water) is water generat ...

, an aerating device for sewage and industrial waste water treatments *

Diffuser (thermodynamics) A diffuser is "a device for reducing the velocity and increasing the static pressure of a fluid passing through a system”. The fluid's static pressure rise as it passes through a duct is commonly referred to as pressure recovery. In contrast, a ...

, a device that controls the characteristics of a fluid at the entrance to a thermodynamic open system *

Aroma lamp Aroma lamps, or diffusers, are used to diffuse essential oils. They may project the oil into the air by heating it, letting it evaporate naturally, or nebulizing it using compressed air or ultrasonics. Evaporative diffuser An evaporative diff ...

(sometimes called an aromatherapy diffuser or reed diffuser), used to disperse

essential oil An essential oil is a concentrated hydrophobic liquid containing volatile (easily evaporated at normal temperatures) chemical compounds from plants. Essential oils are also known as volatile oils, ethereal oils, aetheroleum, or simply as the ...

s into the surroundings * Diffuser (website), website by Townsquare Media