|
Goal: To limit noise levels, allowing students and teachers to enjoy an optimal acoustic environment that is conducive to focusing, interacting and general learning.
- Related Codes & Standards
|
- Tips/Considerations
- Recommended reverberation time is 0.4-1.0 seconds (depending on the size of the space).
- Numerous studies demonstrate how chronic
noise exposure (i.e., noise found in the community, as well
as noise to which we are voluntarily exposed) negatively impacts
education. For more information, read Progressing the Learning
Curve.
- Noise from air-conditioning/heating units or other equipment on the premises can impact the educational environment. In addition to an NC specification for inside the classroom, specify a maximum dB level for all equipment in and around the school.
- Consider the impact of noise from nearby freeways, busy roads, train tracks and other transportation- or industrial-related sources. Identify noise sources in the vicinity and assess the possible impact. Based on this assessment, take the proper steps to minimize or eliminate the potential problem.
- o Noise from adjacent classrooms can be easily transmitted into other classrooms, particularly in an open-classroom setting. It is vital to control the noise transfer between spaces. Keep in mind that STC ratings only address noise isolation from 125 Hz to 4000 Hz. Low frequency sounds (below 125 Hz) are not accounted for in an STC rating. Even if you specify a high STC rating for the wall, it will not allow for privacy if the wall only extends to the ceiling, or just above the ceiling. To ensure isolation, the wall must extend to, and seal to, the deck.
- Even if everything else is controlled
perfectly, the space might not be usable if the background
noise (e.g. HVAC system) is too loud. To help protect your
design, the NC level should not exceed 25 to 35. When specifying
NC, specify an actual rating, such as NC 25, rather than a
range, such as NC 25-30. Although specifying a lower number
will ensure minimal background noise, it might be cost prohibitive
to achieve. Be realistic about the amount of acceptable noise
and the project's budget when specifying an NC level.
|
