HomeMy WebLinkAboutDunkin Donuts Drive-thru noise mitigation 080123 112 State Road / N. Dartmouth MA 02747
Tel: (508) 858-5040 / Fax: (508) 858-5041 / www.choubahgroup.com
August 1, 2023
Ms. Kathleen Williams, P.E.
Yarmouth Town Planner
1146 Route 28
Yarmouth, MA 02664-4492
Re: Proposed gasoline filling station with
convenience store, a drive thru & residential apartments
1272, 1276 & 1282 Route 28
Yarmouth, MA 02664
Applicant/Owner:
Ekaterina & Family, LLC
1282 Route 28
Yarmouth, MA 02664
CEG# 20-586
Dear Ms. Williams,
Hope all is well. I have the following information regarding the proposed Dunkin drive-thru service
and noise mitigation:
The projected peak hours for Dunkin drive-thru are between 6 am to 9 am.
Dunkin uses the 3M C860 and C960 intercom systems which are preadjusted at the factory to
produce an audio sound pressure level of 70 decibels at a distance of 4 feet on axis to the center of
the speaker. Sound diminishes at the rate of 6 decibels every time the distance from the sound
source is doubled. So at a distance of 8 feet from the speaker, the level is 64 feet and at 16 feet it is
58 decibels and at 32 feet it is 52 decibels.
The closest point from the proposed speaker location to the residential property line to the north is
approximately 46 feet at the proposed 8-foot high PVC fence at the property line. As stated above at
32 feet away from the speaker the decibels level is at 52 decibels (without any mitigation) adding
the 20-foot landscape buffer along with the proposed 8-foot high PVC fence (STC rating of 26)
with arborvitaes combination for sound mitigation, we anticipate an ambient noise reduction by 8-
10 decibels bringing the decibels level at the property line (at the 8-foot high PVC fence location) to
44-42 decibels which is lower than normal conversation level at 60 decibels.
I hope you will find this information helpful.
Sincerely,
Choubah Engineering Group, P.C.
Halim A. Choubah, P.E.
Halim A. Choubah, P.E., President
Cc: File, Attorney Paul Tardif, Mr. Jay Imad, Ekaterina & Family, LLC