NRC/STC-Acoustics Forum-Acoustic Fields Forum

Please consider registering
Guest

Home Acoustics Forum Acoustic Treatment NRC/STC

NRC/STC

NAH1082

Member

Members

Forum Posts: 3

Member Since:
March 18, 2018

Offline

March 18, 2018 - 9:18 am

Hello all!,

Do materials with high NRC generally have a high STC as well?

Dennis Foley

Chief Acoustics Engineer

Forum Posts: 605

Member Since:
August 12, 2013

Offline

March 18, 2018 - 9:28 am

It depends on the assembly methodology of those materials and the amplitude and the frequency you are fighting against. Density is just one variable that must be considered. Remember that NRC is calculated using a frequency range starting at 125 Hz. – 4,000 Hz. An NRC is not applicable below 125 Hz where most noise problems lie.

NAH1082

Member

Members

Forum Posts: 3

Member Since:
March 18, 2018

Offline

March 20, 2018 - 5:21 pm

Hi Dennis, may I email or message you directly regarding my concern on this topic?

Dennis Foley

Chief Acoustics Engineer

Forum Posts: 605

Member Since:
August 12, 2013