HomeMy WebLinkAboutS2019-0162 - MiscDL Acoustics
17777771
Homeowner
8 Drakes Bay Dr.
Corona Del Mar, CA, 92625
14301 Middletown Lane Westminster, CA 92683
Voice/Fax 714.373.3050 dlubman@dlacoustics.com
January 30, 2020
Report emailed to: arun@royalkhyber.com
Pool and or Spa Noise report for residence at 8 Drakes Bay Dr., Corona Del Mar, CA
Dear Homeowner:
At about 11:30 a.m. Thursday, January 30, 2020 1 measured the pool and or spa equipment
noise at your nearest neighbor's residence to test for compliance with the Newport Beach noise
regulation (10.26.025).
Newport Beach Residential Noise Standard
For Noise Zone 1 (residential) the N. B. regulation's daytime noise level standard (maximum
noise level from 10 p.m. to 7 a.m.) is 55 dBA— corrected for ambient noise. The nighttime noise
standard (max noise level from 7 a.m. to 10 p.m.) is 50 dBA. The measurement is corrected for
ambient noise and rounded to the nearest decibel as shown below.
I am pleased to report that measured pool and or spa apparatus noise meets the Newport
Beach noise standard for 24-hour use. Pertinent details of my findings are reported below.
Locations and values of daytime noise measurements
Uncorrected pool and or spa noise + ambient noise measured at property line: 49.80 dBA
Ambient noise level measured at this location: not needed
Pool and or spa equipment noise corrected for ambient noise: not applicable
Pool and or spa equipment noise rounded to the nearest decibel: 50 dBA
50 dBA (Pass for 24 hour use)
The currently installed pool and or spa apparatus noise of 50 dBA meets the Newport Beach
noise code for both "daytime" use (7 a.m. to 10 p.m.) and "nighttime" use (10 p.m. to 7 a.m.),
since the noise corrected for ambient does not exceed 50 dBA.
If you have any questions about this report, please do not hesitate to contact me at (714) 373-
3050 or by email at dlubman&dlacoustics.com
Sincerely yours,
Ban. id liatYlt vv6
David Lubman, FASA, FINCE
Acoustical Consultant
Orange County Certification #200524
January 30, 2020
/i1�7�.1�Ij:I11
Measurement Instrumentation
Equipment
The acoustical equipment used in the performance of this test is in accordance with
ASTM and ANSI (American National Standards Institute) requirements. Key elements
are as follows:
Critical sound measuring instruments (sound analyzer, calibrator, and microphone) are
annual calibrated by an independent NAVLAP certified laboratory. The most recent
calibration was on 07/31/19. All calibration documents are available for inspection upon
request.
Critical instruments employed were:
Bruel & Kjaer— Type 2270 Type I Precision Sound Analyzer SN # 3002720
Bruel & Kjaer - Type 4189 microphone, SN # 2850866
Bruel & Kjaer— Type 4231 Field Sound Calibrator, SN # 2588671