Quiz: How does an acoustic ventilation system work?

Quiz: How does an acoustic ventilation system work?
Image: ©iStockphoto.com/James Knighten

About This Quiz

Acoustic ventilation systems can bring fresh air into homes and remove pollutants. Learn all about acoustic ventilation systems through our quiz.
What's the best way to improve indoor air quality?
Use a ventilation system.
Using a ventilation system indoors is the best way to improve air quality. Though many factors, including mold, dust, radon, carbon dioxide, tobacco smoke and cooking fumes, can contribute to poor indoor air quality, most people don't focus on indoor air and don't know how to use their ventilation systems if they have one.
Open a window.
Turn on the air conditioner.

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How is sound measured?
watts
decibels
Sound is measured by decibels (dB). The lowest level of sound a human being can hear is known as zero on the decibel scale. A normal conversation is around 50 decibels, while a musical concert will vary between 90 and 100 dB.
leptons

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How does sound travel?
through vibrations
groups
in waves
To control noise, sound waves need to be slowed down or blocked as they travel through the air. Insulation such as fiberglass sheets can be placed in walls, under roofs and around ductwork to help trap the air particles that make up sound waves.

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When designing an acoustic ventilation system, how much sound should be kept out?
all
some
If you block all the sound from a space, you also block all the air. When planning an acoustic ventilation system, it's best to allow some air and sound into the room.
none

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How do ventilation systems make noise?
fans
air moving through ductwork
both of the above
Fans and other mechanical equipment, as well as air moving through ductwork, can create vibration and noise. In addition, ventilation systems bring fresh air into your home through air intake grilles on the exterior, bringing with it noise from the outside.

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Which type of fan makes minimal noise when used as part of a ventilation system?
Quiet Fan
Quiet Fans, which are widely available, operate at between 10 and 20 decibels on average. They are very efficient and minimize both rattling and vibration.
oscillating fan
ceiling fan

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What should ductwork be lined with to minimize vibration and air noises in your ventilation system?
wax
insulation
To minimize vibration and air noises in your ventilation system, always choose ducts that are lined with insulation and use the largest duct for the available space. Make sure you seal all joints to keep air flowing quietly.
plastic

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How can you minimize noise from exterior air intake units?
Use plastic grilles
Use grilles lined with insulation.
To minimize noise from exterior air intake units, opt for grilles specifically designed for acoustic ventilation solutions that are lined with insulation and include sound dampers to keep noise from entering your home. Be sure to place the units as far away as possible from exterior sound sources such as a busy road or intersection.
Use rubber grilles.

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How many fans should a central ventilation system have?
one
two
A central ventilation system should ideally consist of two fans: one for supply and one for exhaust.
five

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Where is the best place to locate a ventilation fan?
in the attic
Place ventilation fans away from the areas they serve. A bathroom or kitchen exhaust fan should be located in the attic, if possible, and vented out through the roof.
in the garage
in the basement

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You Got:
/10
©iStockphoto.com/James Knighten

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