BLD-2021-2354 AC Sound Rating WorksheetG:/Planning/AC Sound Rating Worksheet/ - revised 09/16/20
Step 1: Select scope of work:
Step 2: Select Make and Model of A/C Unit. Enter Make and Model of unit(s) then enter maximum A/C Unit
Sound Rating from manufacturer’s specifications:
*Make: *Model: *Sound Rating: db
*Make: *Model: *Sound Rating: db (For unit #2)
Step 3: Enter minimum Sound Blanket Sound Rating from manufacturer’s specifications, if used:
Sound Blanket Rating: db (–)
Sound Blanket Rating: db (–) (For unit #2)
Step 4: Specify distance from closest property line to nearest face of unit(s): feet inches
Distance Factor, DF = – 20 * Log ( 0.3048 * ) – 8 = db (–)
Step 5: Location of unit(s). Choose which image best indicates the location of your unit:
Location Factor, LF = db (+)
Step 6: Do you have a solid Concrete Block or Masonry wall a minimum of
6 feet in height along the property line closest to the A/C unit(s)? Yes No
Wall Factor, WF = db (–)
Sound Pressure Sound Pressure
Level ÷ 10 (Unit #1) Level ÷ 10 (Unit #2)
EFFECTIVE
SOUND RATING = db = 10 x Log [ ( 10) + (10) ]
√ COMPLIES
ADDRESS: BP #:
I have reviewed the information on this form and certify the information provided to the best of my knowledge is true and correct. I
understand an authorized representative of Cupertino may provide an on -site verification prior to the final inspection of the project.
Owner or Owner’s Agent’s Signature: ....................................................................................................................... Date: ..............................
AC UNIT SOUND RATING WORKSHEET
COMMUNITY DEVELOPMENT DEPARTMENT • PLANNING DIVISION
10300 TORRE AVENUE • CUPERTINO, CA 95014-3255
(408) 777-3308 • FAX (408) 777-3333 • planning@cupertino.org
Arnold Hom
11/30/21