Sound is the energy materials produce when they vibrate. The vibration forces air around it to vibrate and carry energy out of the materials in all directions. Eventually, even the air inside your ears starts vibrating and that is when you begin to perceive the vibrating drum as a sound.
Woodford, C. ( 2009 ). “Sound.” Explainthatstuff. Retrieved January 14 2020, from https://www.explainthatstuff.com/sound.html
Absorbing means using rubbery materials that soak up incoming sound energy so there's less to transmit onwards into a room, whereas dampening means using a solid, wall that doesn't readily vibrate. Dampening and absorbing might mean fitting solid, thick doors rather than hollow ones, or double doors separated by an air gap. Woodford, C. ( 2009 ). “Soundproofing.” Explainthatstuff. Retrieved January 14 2020, from https://www.explainthatstuff.com/soundproofing.html
Soundproofing works by tackling the two ways in which sound travels.
The most common way that sound travels are as air-borne sound, this occurs when soundwaves, caused by something like someone speaking or music being played, travel through the air. Dan. “Soundproofing: What Is Is, How It Works & How to Do It.”Soundproofpanda. Retrieved January 16 2020, from https://soundproofpanda.com/soundproofing/
The second way sound travels is as impact noise, this is when sound vibrations travel through a solid structure such as floorboards.
Airborne noise is the noise that travels through the air.
Someone talking, a radio or TV playing are examples of common airborne sounds. Dan. “Soundproofing: What Is Is, How It Works & How to Do It.”Soundproofpanda. Retrieved January 16 2020, from https://soundproofpanda.com/soundproofing/
One of the crucial decisions engineers make when designing a good- sounding room—whether a grand auditorium, a courtroom, or an open-plan office—is how long the reverberation time should be. Then they can use Sabine’s equation to work out how much soft, absorbing stuff is needed. Cox,T. (2014). W. W. Norton & Company. Retrieved from http://1.droppdf.com/files/cw6xr/the-sound-book-trevor-cox.pdf
Air-borne noise can be a problem in homes where you have thin internal walls which are poorly insulated and have gaps in them (for example around plug sockets). Dan. “Soundproofing: What Is Is, How It Works & How to Do It.”Soundproofpanda. Retrived 16 Jan 2020, from https://soundproofpanda.com/soundproofing/
The lack of insulation means that the sound can travel freely through the gaps in your wall without being absorbed.
Dealing with airborne noise effectively involves dampening and adding mass. This is done by sealing up walls, doors, floors and ceilings (walls are usually the primary culprit) and adding insulation to prevent airborne noise from travelling through.
Woodford, C. ( 2009 ). “Soundproofing.” Explainthatstuff. Retrieved January 14 2020, from https://www.explainthatstuff.com/soundproofing.html
Research Questions
How does sound travel through materials
What material is the most soundproof
Types of materials that can reduce sound?
Hypothesis
The styrofoam is the most soundproof material
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