Noise Hazards

Noise Hazard, Hazardous, Hazards, Green Building, Green Buiders, Energy-Efficient Homes, Green HousesPlease Note:This website explains green building for a climate zone comparable to North Texas or Central Texas, such as the climate of Waco or Dallas-Fort Worth, Texas. It is important to hire a green builder who is an expert in energy-efficient building in your climate zone.

Hazardous Noise Control in Green Building

A Quiet, Green Home  

This website is for the climate zone that includes North Central Texas or the DFW area such as Plano, Keller, or Dallas-Fort Worth Texas.  Regardless of your climate zone, the first priority for green building or energy-efficient remodeling is to hire an energy consultant and a green builder who understand and use up-to-date green building practices for your area. 

Is noise control a matter of comfort in greenbuilding or actually a hazard? That is the question.

The answer is that  noise can be both ahazard and a matter of discomfort or annoyance. Two factorsdetermine this: 

  • Intensity (Loudness) measured in dBA 
  • Time of Exposure measured in hours and minutes.

The louder the noise, the more hazardous it isbut the dBA level alone does not define noise hazard. The longer the exposuretime, the more hazardous the noise. A “Noise Dose” combines both loudnessand time and is a convenient way of describing the relative hazard of the noise. "Noise Dose" defines the noise hazard.
Noise Dose = Loudness + Exposure Time
Quiet (45dBA) for 8 Hrs = 0% Noise Dose

One other point: Loudness is measured using alogarithmic scale. This means that a 10 decibel increase does not simply add 10to the previous level. It multiplies the previous level by 10.

Examples:

Quiet room: 45 dBA
Conversation: 55 dBA = 45 dBA x 10
Car (50 mph at 50 ft)  65 dBA = 45 dBA x 100

Noise that is louder than busy city traffic forany length of time is potentially hazardous.

Perception

1 or 2 dBA are not perceptible to most humansoutside of a carefully controlled lab environment. A change of 3 dBA isdiscernible, however, and a change of 5 dBA is clearly discernible. That is thedBA change from a quiet room to a conversation.

With respect to a reference sound level, a change of -5 dBA is perceived by thehuman ear as ¾ as loud; a change of –10 dBA is perceived as 1/2 as loud; anda change of –20 dB is perceived as ¼ as loud. 

Distance is also important to perception. Doubling the distance to a soundsource from some reference location makes the perceived sound ½ as loud, whilehalving the distance makes it twice as loud.

Do you need an energy consult
or energy audit or
green builder/remodeler
in North Central Texas
or the Dallas-Fort Worth area?
Contact Terry Jensen
Frugal Energy, LLC
817 443-2553 or 972 251-1532

 

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Note: The opinions expressedherein are exclusively those of the writers or other participants and do not necessarily reflect theposition of CyberParent,LLC. They are not intended to take the place of advice of ahealth, legal, or other professional whose expertise you might need to seek.This website explains green building and green remodeling for a climate zonecomparable to North Central Texas or Dallas-Fort Worth, Texas,  It isimportant to hire a green builder and an energy consultant who are experts inenergy-efficient building in your climate zone and who use the most up-to-dategreen building information.