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2. Diffuser - Wikipedia

   en.wikipedia.org/wiki/Diffuser

   Diffuser (sewage), an aerating device for sewage and industrial waste water treatments; Diffuser (thermodynamics), a device that controls the characteristics of a fluid at the entrance to a thermodynamic open system; Aroma lamp (sometimes called an aromatherapy diffuser or reed diffuser), used to disperse essential oils into the surroundings

3. Diffuser (thermodynamics) - Wikipedia

   en.wikipedia.org/wiki/Diffuser_(thermodynamics)

   A round diffuser in an HVAC system. Diffusers are very common in heating, ventilating, and air-conditioning systems. [3] Diffusers are used in both all-air and air-water HVAC systems, as part of room air distribution subsystems, and serve several purposes:

4. Aroma lamp - Wikipedia

   en.wikipedia.org/wiki/Aroma_lamp

   An evaporative diffuser is a device that uses a pad, filter, or reeds to diffuse the essential oils. [2] One of the disadvantages of this tool is that the light elements of the essential oils will be circulated around the ceiling first and will only come down at the end of the process.

5. Diffuser (sewage) - Wikipedia

   en.wikipedia.org/wiki/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. Oxygen is required by microorganisms/bacteria residents in the water to break down the pollutants.

6. Diffusion (acoustics) - Wikipedia

   en.wikipedia.org/wiki/Diffusion_(acoustics)

   Diffusors (or diffusers) are used to treat sound aberrations, such as echoes, in rooms. They are an excellent alternative or complement to sound absorption because they do not remove sound energy, but can be used to effectively reduce distinct echoes and reflections while still leaving a live sounding space.

7. Diffuser (optics) - Wikipedia

   en.wikipedia.org/wiki/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, while more compact diffusers may use translucent material, including ground glass, teflon, opal glass, and greyed glass.