US Green Building Council LEED-AP-ID+C Exam - Topic 3 Question 5 Discussion

Actual exam question for US Green Building Council's LEED-AP-ID+C exam

Question #: 5
Topic #: 3

The site of a new open-plan office building is located near a highway. The acoustic consultant is investigating the possibility of using sound masking system to cover the noise impact from the busy road. If sound masking is found to be a feasible option, the noise design of the project can have a maximum limit up to

A36 dBA

B48 dBA

C62 dBA

D70 dBA

Show Suggested Answer

Suggested Answer: B

According to the LEED v4 guidelines for Interior Design and Construction, sound masking systems are used to provide an acoustically superior environment for occupants.The design levels for these systems should not exceed 48 dBA to ensure that loudspeaker coverage provides uniformity of 2 dBA and that speech spectra are effectively masked1.

LEED v4 for Interior Design and Construction guidelines on acoustic performance and sound masking systems1.

by Ressie at Jan 14, 2025, 03:01 PM

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Danilo

6 months ago

Actually, I believe it should be 70 dBA for some flexibility.

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Julianna

6 months ago

I’m not sure about that, 36 dBA feels more appropriate.

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Luis

7 months ago

Wait, 62 dBA? That seems too high for an office!

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Arlene

7 months ago

Definitely agree, 48 dBA sounds right!

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Cruz

7 months ago

I think the max limit is 48 dBA.

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Dalene

7 months ago

I vaguely remember something about 36 dBA being too low for an office setting. I think 48 dBA might be the right answer, but I’m not completely sure.

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Pamella

8 months ago

I’m a bit confused. I thought sound masking was supposed to help with noise levels, but I can’t recall the specific maximum. Could it really be as high as 70 dBA?

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Royal

8 months ago

I feel like we practiced a similar question, and I think the limit was higher, maybe 62 dBA? That sounds familiar.

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Felicia

8 months ago

I remember we discussed sound masking in class, but I’m not sure about the exact dBA limits. I think it might be around 48 dBA?

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Peggy

8 months ago

Wait, I'm confused. Is the question asking about the maximum noise limit or the target noise level after sound masking? I need to re-read this carefully.

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Corinne

8 months ago

Okay, I've got this. The key is understanding how sound masking works to cover up unwanted noise. I think the answer is B, 48 dBA, as that's a common target for open-plan office noise levels.

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Noemi

8 months ago

Hmm, I'm a bit unsure about the specifics of sound masking and how it relates to noise limits. I'll need to review my notes on acoustic design principles.

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Glen

8 months ago

This seems like a straightforward acoustics question. I'll need to think about the typical noise levels in an open-plan office and how sound masking can be used to cover external noise.

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Marya

1 year ago

C) 62 dBA, of course. Why settle for anything less than the maximum allowable limit? Let's turn that office into a deafening symphony of productivity!

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Corinne

1 year ago

C) 62 dBA, of course. Why settle for anything less than the maximum allowable limit? Let's turn that office into a deafening symphony of productivity!

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Ettie

1 year ago

A) 36 dBA

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Elly

1 year ago

I think the correct answer is 62 dBA because it provides a good balance between noise reduction and cost.

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Larue

1 year ago

Ah, the old sound masking debate. I say we just install a giant white noise machine and call it a day. That'll drown out the highway noise and give everyone a nice, soothing headache.

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Jimmie

1 year ago

D) 70 dBA

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Garry

1 year ago

C) 62 dBA

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Bok

1 year ago

B) 48 dBA

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Anna

1 year ago

A) 36 dBA

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Terrilyn

1 year ago

I don't know, 48 dBA might be a bit too low. I'd go with D) 70 dBA - that way the noise from the highway won't be a problem, and we can crank up the music to our heart's content!

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