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9. (a) Using notes and freehand sketches explain any two of the following: - sound absorption - sound reflection - reverberation time - Leaving Cert Construction Studies - Question 9 - 2014
Question 9
9. (a) Using notes and freehand sketches explain any two of the following: - sound absorption - sound reflection - reverberation time. (b) A bedroom is located on ... show full transcript
Worked Solution & Example Answer:9. (a) Using notes and freehand sketches explain any two of the following: - sound absorption - sound reflection - reverberation time - Leaving Cert Construction Studies - Question 9 - 2014
Step 1
Using notes and freehand sketches explain sound absorption
Answer
Sound absorption refers to the amount of sound that is absorbed by various surfaces and materials in a room. Hard, smooth surfaces reflect sound very little; therefore, they do not contribute significantly to sound absorption. In contrast, softer surfaces such as carpets, curtains, and furnishings can effectively absorb sound, thereby minimizing echo and overall sound levels. A freehand sketch may illustrate sound waves striking a surface, with lines showing how some waves are absorbed.
Step 2
Using notes and freehand sketches explain sound reflection
Answer
Sound reflection is the process by which sound waves bounce off surfaces. This principle is similar to the behavior of light, where the angle of incidence equals the angle of reflection. Reflective surfaces, such as walls and ceilings, can alter the acoustics of a room. In entertainment settings, thoughtful arrangement of reflective surfaces can enhance sound distribution ensuring auditory clarity. A sketch can depict an incident sound wave interacting with a reflective surface, demonstrating the angle of incidence and reflection.
Step 3
Using notes and freehand sketches, show a revised design for sound insulation in the room
Answer
To enhance sound insulation, consider implementing a staggered stud partition to minimize contact between adjoining walls and create a void between partitions. Utilizing two layers of plasterboard with staggered joints will significantly improve sound reduction. Incorporation of an absorbent quilt within the partition adds further sound insulation. Additionally, a floating floor can be designed over existing joists without nailing, which will mitigate flanking paths. Absorbent quilt placed between joists will reduce sound transmission. Freehand sketches should detail this design, indicating materials such as plasterboard and absorbent quilts, along with their typical dimensions.
Step 4
Explain the sound insulation principles associated with the design details
Answer
The principles of sound insulation rely on factors such as mass, isolation, flexibility, and completeness. Mass refers to the mass law principle where sound insulation is proportional to the mass per unit area of a wall. Increasing material density enhances soundproofing capabilities. Isolation involves separating surfaces to prevent sound transmission through direct contact, such as utilizing voids in partitions. Flexibility suggests that softer, flexible materials absorb sound better than hard surfaces. Lastly, completeness addresses the need to eliminate small gaps, ensuring airtightness, which improves acoustic properties significantly.