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Assignment on Reducing Noise

   

Added on  2021-06-17

6 Pages1123 Words62 Views
Q1. Using diagrams list and explain three ways that construction design solutions are used to reduce noise at the source.SOLUTIONS TO REDUCE NOISE AT THE SOURCEThe most efficient way to reduce noise at its own source as the noise has less chance to avoid thebarrier to control. It is less costly solution as they include the source of noise if the barriers are smaller.1-If the noise is placed in an enclosure of soundproof room then the noise can be reduced. Heavy construction is another appropriate type of barrier (Dagostino 1998)2-While the need forenclosure is not required to be built for the source of a noise. It is simply the issue of placing a noisy machine in the accurate place. One of the example is placing heavy machinery for construction in the basement. The auditory mass around is the main obstacle which transmit the noise.3-Air and the structures are the main factors by which sound is transmitted. By changeable links to the services and by inserting machinery on flexible supports, structure-borne noise could be reduced. The noise source should not have echoing frequency that is near to the support.

Q2. In a diagram explain some of the pathways for flanking sound transmission in building structure. How is this best dealt with?Flanking sound TransmissionThe resistance of sound may be compromised by a feeble connection in the auditory barrier.Transmission by Air- borneNoise can be transmitted by inappropriate placing of windows and ductwork. The Flanking noisecan be absorbed by the absorbent panels which are insertedinto the ductwork. Porous gaps for airon doors and windows are also a passage to leak the sound. Tape and gaskets are used to close these air gaps. To protect from the air-borne transmission, air- tight construction is the finest solution. In summer, when ventilation is needed so it is difficult to attain in hot weather. (McMullan 1998)Transmission by Structure-borne Sound can still be transmitted through the wallsby vibration even if the construction is air proof. Continuous elements of the structure convey air-borne noise. Part of the structure may be isolated by giving elastic underlay and by avoiding mechanical combination.

Q3. Why is structure-borne sound transmission often a problem in older residential apartment blocks? Sound can still be transmitted by vibration through the walls of air- tight construction. Floors andwalls are the continuous elements and can transmit noise by air-borne and through the impact of the structure. If the service areas are in the direction of sound sources than the sensitive rooms can be isolated. Windows and doors must be designed in a manner which is away from the effectofsound. About 30 years ago, on road of Pennant hills at North Parramatta, the Quiet House was exhibited. Though, as an auditory structure, it was very successful and could never advertise the building. The Quiet House was very hot and close. As the building was so airtight even it was survived after the arson attack. The apartments replaced the Quiet House when it was demolished. Dual garage and laundry are the buffer rooms at the front of the building of Quiet House. At the back of the building, the bedrooms, the noise sensitive rooms are placed. The courtyard covered the entry and located at the right angled to Pennant roads (Greenland 1998)

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