The law of reflection states that the angle of reflection equals the angle of incidence—θr = θi. The angles are measured relative to the perpendicular to the surface at the point where the ray strikes the surface.

You have read that mechanical waves travel through a medium like air, water, or the ground. When waves interact with materials in these ways, they behave predictably. All waves, from water waves to sound waves and even light waves, show the behaviors that you will learn about next.

The angle of reflection is always equal to the angle of incidence . The reflected sound, the incident sound, and the normal sound belong in the same plane.

Fortunately, there are several ways to reduce traffic noise and other noises from the street.

1. Use Nature. One way to block noise from the street is to get nature back on your side.
2. Change Your Windows.
3. Seal the Gaps.
4. Add Acoustical Panels.
5. Get in Touch With Soundproof Cow and Block That Street Noise Today.

As sound travels through a medium such as water, it gets absorbed – caught by the molecules within the medium. They do this by stealing some of the energy from the sound wave. The absorption in sea water is much greater than would be expected due to the viscosity of pure water.

They cannot travel — as light waves can — through completely empty space where there is no air. Just as a mirror reflects light, some surfaces reflect sound. A sound reflection that you can hear as a separate repetition is called an echo. We do not hear an echo if we are close to the reflecting surface.

List of the 14 Best Sound Absorbing Materials

• Soft Furniture.
• Thick Carpets and Rugs.
• Paintings or Tapestries.
• Sound Absorbing Egg Cartons.
• Regular Curtains and Blankets.
• Acoustic Window Film.
• Sound Absorbing Curtains.
• Sound Absorbing Room Divider Curtains.

plywood

Answer. Explanation: reflection of sound is the bouncing of sound wave back in the same medium. the best reflectors are walls and any hard object.

Usually, concrete is a good insulator of sound, which can reflect up to 99% of its total energy. However, it is also a relatively poor absorber of sound and can propagate within enclosed spaces, causing echoes [29–32]. Airborne sounds can be recognized as speech, loudspeakers, and musical instruments, respectively.

Hard surface reflects the soundwaves back to where the sound waves originated, because they can not penetrate the solid very easily so the sound waves bounce off the hard material.

Brick, stone, concrete, reflect all sound. Timber, gyprock, steel, reflect most high frequencies and a % low frequency is absorbed by the wall. The remaining low frequency energy that is not reflected or absorbed passes through the wall.

When soundproofing is your goal, your best options out there are fiberglass insulation and blown-in cellulose insulation. Both materials are incredibly good at their jobs; they insulate incredibly well but also have the coveted noise-reducing properties that many homeowners are seeking.

When soundproofing a room start with the walls.

1. Choose a Noise Reducing Drywall. Traditionally to reduce noise transfer between rooms you’d use a resilient channel.
2. Insulate Interior Walls.
3. Float the Floors.
4. Soften the Surfaces.
5. Seal it Up.
6. White Noise.

Adding mass

1. Build a thicker wall. If you’re building a wall from scratch, choose a thicker drywall (around 1.6cm) that can absorb more sound.
2. Apply wall padding.
3. Use Acoustical Glue.
4. Create air gaps.
5. Float the floor.
6. Use isolation pads.
7. Seal gaps with foam gaskets.
8. Install a door sweep.