This prerequisite encourages quality acoustical design, which helps create indoor environments conducive to teaching and learning. However, the credit requirements can be difficult and expensive to achieve. Consider enlisting the expertise of an acoustical consultant to ensure your project meets the requirements for all applicable spaces.

Good acoustical design can be cost-effective in any project as long as acoustics are considered early in design. Waiting until the design is set can lead to additional costs and needless frustration if you end up having to redesign mechanical systems or the building envelope. Having the entire design team focused on acoustics, including stakeholders such as school board members, the principal, or teachers, will help ensure a consistent focus throughout the project, and will help the project surmount obstacles that may arise.

When setting project goals, consider both this prerequisite and EQc9: Acoustical Performance. The credit includes expanded considerations around acoustics that further support the creation of quality educational environments.

What’s New in LEED v4

• The maximum allowable background noise level has been reduced from 45 dBA to 40 dBA.
• The referenced standard for reverberation time has changed to NRC-CNRC Construction Technology Update No. 51 for spaces that are 20,000 ft3  (566 m3) or larger. This standard specifies variable reverberation time and total sound absorption values, depending on the size of the space.
• To minimize exterior noise intrusion into the classrooms and core learning spaces, the credit now includes an exterior noise requirement.
• ANSI S12.60–2010 is now the updated ANSI reference standard.
• The 2011 HVAC Applications ASHRAE Handbook, Chapter 48, Noise and Vibration Control is now the referenced standard.
• USGBC has added exceptions for projects with limited renovation scopes or strict historic preservation requirements.