Noise Research

Roadmap and Update

REDAC – E&E Subcommittee

Rebecca Cointin, Manager, AEE-100

August 6, 2015

Presented to:

By:

Date:

Federal Aviation

Administration

Federal Aviation

Administration

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1

Noise Goal

Reduce the number of people exposed to significant noise around U.S. airports in absolute terms, notwithstanding aviation growth, and provide additional measures to protect public health and welfare and our national resources.

Specifically, by 2018, have the U.S. population exposed to significant aircraft noise around airports have been reduced to less than 300,000 persons

Research is examining the appropriateness of the level of significance, potential for other metrics and evaluating the long-term goal

2

Federal Aviation

Administration

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Drivers of Research

Observation: 

Even though the number of people in the U.S. exposed to significant aircraft noise since 1975 has dropped by 95 percent, complaints, opposition and challenges continue to be an issue

Needs:

Gather data to determine if there has been a significant change in the public perception of noise

Gather supplemental data to develop strong scientific support for any policy decisions regarding aviation noise

3

Federal Aviation

Administration

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4

Federal Aviation

Administration

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4

ANNOYANCE

Draft Deliberative. Not for Release. Subject to Change. 

Re-Evaluate Threshold 

Research: 2014 – end of 2016

Evaluation of Policy (2017)

Coordination

CBA

Public Process (2018 – 2019)

FR Notice of Policy 

Rulemaking for Regulations to be updated

Re-Evaluate Metric 

Effort: 2017 – 2019

Use Survey data

Consider other impacts in Research Roadmap

Re-Evaluate Policy

Effort: 2020 – 2025

Metric and Threshold

HEALTH

Draft Deliberative. Not for Release. Subject to Change. 

Outcome:

Quantified risk of cardiovascular disease

COE WHI Study (2014 – 2016)

Significant signal?

Do results vary with DNL level? 

Are other metrics needed?

Next Step (2016 – 2018)

Ideally 1 – 2 more cohorts with consistent results to establish scientific basis

Tools linkage: 

Ensure AEDT/APMT-Impact can compute what is needed

Translate costs to APMT-Impacts 

SLEEP

Draft Deliberative. Not for Release. Subject to Change. 

FY 14 – 15 effort (funded)

Small field study (testing method)

FY15 effort (funded)

Analyze small field study results

FY 15 – 16 effort (funded)

Another small field 

Cheaper equipment/less invasive

Prepare for large scale field study

FY 17 – 18 effort (funding TBD)

Examine dose response (awakening vs noise metric)

Analyze data from study

Create additional method as needed

Establish scientific basis

Incorporate into AEDT and APMT-Impacts

CHILDREN’S LEARNING

ACRP 02-47 (2014 – 2016)

Case Studies 

Goal: in-depth reaction; inside/outside measurement and correlated reaction

Link between aircraft noise and learning (from previous ACRP)

Statistical significance exists

Insulation does matter

Criteria to mitigate

Plan to look at reaction at a few more school districts (i.e. expand ACRP) Need to determine where: types of districts, willingness to participate, and NLR

Establish scientific basis (2018 – 2019)

Open Questions:

Do we examine link to home life? Link to sleep?

8

Project Status Updates

9

Federal Aviation

Administration

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<Date of Presentation – Change on Master Slide>

FY15 Noise Projects

AEE Funded

Noise Impact Health Research

Noise emission and propagation modeling  

Civil, supersonic over flight, sonic boom (noise) standards development 

Noise Outreach

Sleep Disturbance

Support ASA Workgroup on dose-response for National Parks

Ray Tracing Development for Modeling

Launch Noise and Sonic Boom Research 

Aircraft Certification (CAEP support, validation tool development, validation)

Rotorcraft Noise Abatement Procedure Development

Examine airline flight data to improve flight performance modeling

PBN Research

Helicopter Noise Annoyance 

ARP Funded

National Survey

10

Federal Aviation

Administration

<Presentation Title – Change on Master Slide>

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National Survey

Objective

Conduct a new nation-wide survey to update the scientific evidence of the relationship between aircraft noise exposure and its effects on communities around airports

Status 

Contract for the last two phases of work has been awarded

Surveys will begin this summer

11

Federal Aviation

Administration

<Presentation Title – Change on Master Slide>

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Performance Based Navigation Research

Examining the effects of PBN procedures which may focus of noise on populations

Research on Metrics just kicked off

Compute multiple metrics to determine the best metrics that correlate the effects of PBN procedures with public perception 

Goal: Identify potential supplemental metrics for PBN analysis

Project team includes members of AJV-114 (part of ATO) 

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Federal Aviation

Administration

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Impacts Research

Health

Working with the Women’s Health Initiative Database

Noise data for certain individuals around airports in the database from 2000 – 2014 will be provided to the team

Analysis of potential health impacts will begin once noise data is provided to the team

Sleep

Finishing pilot study around single US airport

Beginning to explore another pilot study with a methodology aimed to be less invasive (mailing of equipment and self-administered)

13

Federal Aviation

Administration

<Presentation Title – Change on Master Slide>

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Helicopter Projects

Rotorcraft Noise Abatement Procedure Development

Successful integration of noise prediction code, rotor loads and wake prediction model, and flight control model

System validated using Bell 430 flight test data - good agreement

Predictions have been made for various flight conditions: altitudes, airspeeds, and climb/descent slopes

Helicopter Noise Annoyance

Test plan was developed to conduct a helicopter noise annoyance survey in the LA basis, which included development of a Smart Phone App to log complaints and selection of volunteers for the test

Testing occurred with five volunteers for ten days with monitoring

Goals:

Test whether these subject reactions and noise levels can be accurately collected and combined into a useful database.

Use the database to test whether some noise measures other than the ones now commonly used to assess fixed wing noise annoyance should be considered for predicting helicopter.

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Federal Aviation

Administration

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Noise Complaint Initiative

Representatives from across the lines of business and staff offices 

Two Goals:

Identify a consistent agency-wide process for addressing noise complaints 

Identify actions the FAA might take to better address the underlying issues raised by the complaints, including increased community engagement and further minimizing noise impacts where possible

Team recommendations are being finalized and will be presented to FAA executives in the Fall

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Federal Aviation

Administration

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Supersonics

International Work

Identifying potential noise certification measurement points

Identifying potential noise certification metrics

Boom Metrics Variability Study

Explore the sensitivities of turbulence on sonic boom metrics using available measured data

Impulsive-Response Database Review  

Review of existing impulsive noise databases were compared for similarities of human response and studied to ranks drivers 

Strongest Drivers: interference, startle, loudness, vibration, and rattle

16

Federal Aviation

Administration

<Presentation Title – Change on Master Slide>

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Propagation

Ray Tracing Development for Modeling

Continue to implement ray modeling into future AEDT, current focus on predicting SEL (flight event)

Worked out detailed steps (de-propagation to source and re-propagation to receiver), and started preliminary coding 

Next Steps are layered atmosphere modeling,  model verification and validation, and runtime optimization 

Noise emission and propagation modeling 

Continue to develop prediction capability (i.e. Fast Field Program/ray) and investigate effects of source motion and atmospheric  data 

Able to predict realistic overflight scenarios with effects (and interaction) of source motion, upper air atmospheric absorption etc    

Next Steps is to access field measurement data for models validation, effective handling of meteorological data 

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Federal Aviation

Administration

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