Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide...
Transcript of Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide...
![Page 1: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/1.jpg)
© Rational Acoustics LLC 2020 - All rights reserved
Session 6:
“All About SPL”
Operator Fundamentals Online
![Page 2: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/2.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 2
Jamie Anderson◦ President, Director of Training◦ [email protected]
Chris Tsanjoures◦ Smaart Product Manager, Instructor◦ [email protected]
Michael Lawrence◦ Application Support Specialist, Instructor ◦ [email protected]
Gavin Caanan◦ Training Coordinator◦ [email protected]
© Rational Acoustics LLC 2020 - All rights reserved
![Page 3: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/3.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 3
© Rational Acoustics LLC 2020 - All rights reserved
Rational Acoustics LLC32 Crabtree Ln
Woodstock, CT 06281USA
+1 (860) 928-7828
www.RationalAcoustics.com
![Page 4: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/4.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 4
What is SPL?
Why do we measure it?
How do we measure it?
SPL Features in Smaart v8 & Smaart SPL
© Rational Acoustics LLC 2020 - All rights reserved
![Page 5: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/5.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 5
Sound Pressure Level
An objective measure of the strength of air pressure deviations caused by a sound wave
© Rational Acoustics LLC 2020 - All rights reserved
A
T
![Page 6: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/6.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 6
Expressed in decibels
Logarithmic scale corresponds well with human hearing (% change)◦ 1 to 2 is perceived as the same increase as 100 to 200
© Rational Acoustics LLC 2020 - All rights reserved
0 dB SPL – threshold of hearing20 µPa (0.00002 Pa)
120 dB SPL – threshold of pain
1,000,000 : 1
20log(1,000,000/1)= 120 dB
H
![Page 7: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/7.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 7
SPL is an objective measurement of physical reality
Human loudness perception is extremely complex, with many factors
◦ Tonal content / balance
◦ Intelligibility
◦ THD
◦ Continuous vs Impulsive
◦ Listener Fatigue
◦ Familiarity and Preference
◦ Context & Program Material
Humans are not particularly reliable judges of SPL
© Rational Acoustics LLC 2020 - All rights reserved
![Page 8: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/8.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 8
Originally an attempt to produce a measurement that “looks like it sounds”
© Rational Acoustics LLC 2020 - All rights reserved
What is the goal?
![Page 9: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/9.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 9
Sound Engineer awareness of:
◦ Consistency / Quality control
◦ Dynamic Range
◦ Fatigue
◦ Awareness of level somewhere else
Venue awareness:
◦ General / policy / courtesy
◦ Consistency
◦ Nuisance Monitoring
© Rational Acoustics LLC 2020 - All rights reserved
![Page 10: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/10.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 10
Noise Pollution / Nuisance Noise◦ Not bothering the neighbors
US: No enforced federal law◦ 42 U.S.C. §4901 et seq. (Noise Control Act of 1972)
◦ Largely focused on interstate commerce (appliances, trucks, railroads, etc)
◦ Defunded in 1981, responsibilty shifted to state / local
Many state /local regulations reference ANSI S1.4-1971◦ A-weighted measurement
◦ Ignores the LF energy that is usually the most problematic
◦ Many have poor wording: “Shall not make excessive noise” (???)
© Rational Acoustics LLC 2020 - All rights reserved
![Page 11: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/11.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 11
© Rational Acoustics LLC 2020 - All rights reserved
Courtesy of Chris Leonard
Inside Venue
Outside Venue
Vs.
![Page 12: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/12.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 12
How loud is “too loud?”
When dealing with exposure, the question is twofold:
◦ - How loud?
◦ - How long?
© Rational Acoustics LLC 2020 - All rights reserved
![Page 13: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/13.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 13
OSHA PELs will not protect you from NIHL (Noise-Induced Hearing Loss)!
NIOSH: Criteria for a Recommended Standard: Occupational Noise Exposure (1998)
https://www.cdc.gov/niosh/docs/98-126/pdfs/98-126.pdf?id=10.26616/NIOSHPUB98126
© Rational Acoustics LLC 2020 - All rights reserved
OSHA Permissible Exposure Limits
Sound level
(dBA)
Duration
(Hours:Minutes)
85 16:00
90 8:00
95 4:00
100 2:00
105 1:00
110 0:30
115 0:15
120 0:07
NIOSH Recommended Exposure Limits
Sound level
(dBA)
Duration
(Hours:Minutes)
82 16:00
85 8:00
88 4:00
91 2:00
94 1:00
97 0:30
100 0:15
103 0:07
![Page 14: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/14.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 14
© Rational Acoustics LLC 2020 - All rights reserved
dblimits.com
![Page 15: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/15.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 15
© Rational Acoustics LLC 2020 - All rights reserved
SPL Slow
![Page 16: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/16.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 16
© Rational Acoustics LLC 2020 - All rights reserved
SPL Slow Leq 10
![Page 17: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/17.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 17
Leq = Equivalent Continuous Sound Pressure Level
© Rational Acoustics LLC 2020 - All rights reserved
Important for live events due to fluctuating levels
Allows a statement about level compliance
Leq 10 = 10 minute average
LAeq 10 = A-weighted
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019N3eSAE&l=en-US
![Page 18: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/18.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 18
Choosing Hardware◦ Calibrator
◦ Mic
◦ Interface
◦ Max SPL = 140 dB SPL
◦ Why 140 dB SPL?
© Rational Acoustics LLC 2020 - All rights reserved
![Page 19: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/19.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 19
© Rational Acoustics LLC 2020 - All rights reserved
A Slow
C Slow
Peak C
![Page 20: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/20.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 20
140 dB SPL w/o clipping (THD <3%)
Check sensitivity for voltage output at 140 dB SPL◦ iSEMcon EMX-7150: 6 mV/Pa
@ 140 dB SPL: 1.2Vrms (+4 dBu)
◦ EW M30: 34 mV/Pa
@ 140 dB SPL: 6.8Vrms (+19 dBu)
◦ Shortcut: 140 – 94 dB = 46 dB (200x)
© Rational Acoustics LLC 2020 - All rights reserved
1 Pa = 94 dB SPL
Choose Mic & IO together:
https://www.youtube.com/watch?v=Xcnp5VwV9Hc
(video courtesy of iSEMcon gmbh)
![Page 21: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/21.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 21
Measurement goals dictate accuracy requirement
Consistency: accurate calibration is not important. Hit the same numbers every night.
Noise pollution: numbers need to be meaningful
Exposure: accurate calibration is extremely important.◦ Since exposure times are based on level, an error in measured level correlates directly
to an error in exposure dose
© Rational Acoustics LLC 2020 - All rights reserved
![Page 22: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/22.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 22
14min
28min
42min
57min
73min
90min
![Page 23: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/23.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 23
Class 1 vs Class 2
© Rational Acoustics LLC 2020 - All rights reserved
Type 1 vs Type 2
Standards?
![Page 24: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/24.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 24
IEC 61672-1:2013:◦ Class 1 SPL systems are required to measure over a wider frequency range than a
Class 2 system as well as meet tighter tolerances for performance criteria and documentation. The nitty-gritty details are laid out in the standards document IEC 61672
◦ The differences between Classes are not limited to microphone and interface tolerances (the entire signal acquisition chain is subject to specified tolerances), but also the format and detail with which the measurement data is logged and kept for presentation in a legal setting. It is for this reason that the UI (user interface) displaying the measurement results are also factored in Class compliance.
◦ The stipulations for documentation of SPL information outlined in the IEC standards state that specific data must be reported and documented over the duration of exposure.
![Page 25: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/25.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 25
© Rational Acoustics LLC 2020 - All rights reserved
![Page 26: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/26.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 26
© Rational Acoustics LLC 2020 - All rights reserved
![Page 27: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/27.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 27
National Institute of Standards and Technology (NIST)
Certificate of Traceability
© Rational Acoustics LLC 2020 - All rights reserved
![Page 28: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/28.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 28
© Rational Acoustics LLC 2020 - All rights reserved
![Page 29: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/29.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 29
© Rational Acoustics LLC 2020 - All rights reserved
![Page 30: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/30.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 30
© Rational Acoustics LLC 2020 - All rights reserved
CDC/NIOSH Study: 130 iOS apps, 3 were within 2 dB
https://blogs.cdc.gov/niosh-science-blog/2014/04/09/sound-apps/
“An analysis of 50 different apps indicated that only one was accurate to within 5 dB.”
https://www.who.int/pbd/deafness/Hearing_loss_due_to_recreational_exposure_to_loud_sounds.pdf
Clipping / overload at concert-level SPLs
![Page 31: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/31.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 31
© Rational Acoustics LLC 2020 - All rights reserved
![Page 32: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/32.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 32
© Rational Acoustics LLC 2020 - All rights reserved
10 EaZy WebsiteU.S. www.10eazy.usEverywhere Else: www.10eazy.com
![Page 33: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/33.jpg)
Smaart Operator Fundamentals OnlineSession 6
Slide 33
© Rational Acoustics LLC 2020 - All rights reserved
Smaart SPL Guide◦ www.rationalacoustics.com/download/SmaartSPLQuickStartGuide.pdf
Smaart SPL Quickstart (Video) ◦ www.youtube.com/watch?v=CvlpGWwwMf0&feature=emb_logo
Calibrating for SPL with Smaart (Video)◦ www.rationalacoustics.com/support/464494-How-do-I-calibrate-Smaart-for-SPL
Smaart SPL Product Page (More Info/More Videos)◦ www.rationalacoustics.com/smaart/smaart-spl/
![Page 34: Operator Fundamentals Online - Rational AcousticsSmaart Operator Fundamentals Online Session 6 Slide 10 Noise Pollution / Nuisance Noise Not bothering the neighbors US: No enforced](https://reader034.fdocuments.us/reader034/viewer/2022043007/5f92550cc433bf564a129eca/html5/thumbnails/34.jpg)
www.rationalacoustics.com
© Rational Acoustics LLC 2020 - All rights reserved