By request I created this map of existing (pre-NextGen) noise impacts from aircraft in the SoCal study area. Uses are to compare what you’re hearing against the FAA’s modeled baseline. For noise impacts due to proposed SoCal NextGen refer to : Total noise impacts Change in noise impacts Disclaimer: This map only contains those flight …
The Change in Noise map I created shows the intensity of noise changes. This is just a quick post to show how the map can be used to inform what you’re seeing in the Google Earth data. I ran across some EA comments by Tabor Law for their clients AirFair out of Newport Beach. In it they question the dispersion …
Following is the second part of the proposed changes noise mapping- How noise will change in each census block in the SoCal Metroplex. I’ve already mapped the total aircraft noise map here. Firstly, the FAA did provide this disclaimer about the use of this data: “This information is provided for informational proposes only and is not intended for …
I’m still wading through the data the FAA team has given us. Some of my initial comments to the EA team were that we needed the noise data, waypoint coordinates and.. that it’d be nice to have the Google Earth flight track data. The feedback I got back then was that was asking too much. …
Continue reading ‘Total Aircraft noise over Population map’ »
Below are some comments and specific feedback on the assumptions about the mix of airplanes used in modeling the noise data. Comments are specific to LAX aircraft aggregation and is also intended to be applicable as a general comment to other airports. Segmentation of Night time operations are not represented 1.) During daytime the LAX airport operates in …
Continue reading ‘Specific feedback on Aircraft Activity Assumptions’ »
This weekend I sat down with the newly released KML and way-point data from the FAA. The new authoritative “TARGET” way-point data allowed me to confirm my coordinates and there were no surprises there. Once I loaded up the new flight track KML on top of my authenticated flight tracks I got a bit of a surprise: …
The proposed LAX BIGBR STAR replaces the BASSET and REDEYE conventional procedures. I am concerned about the increased noise impact that lowering the altitude 12.5% over residential areas will cause. UPDATE 9/2/2016* The proposed LAX MDNYT STAR will replace REDEYE for Over Ocean Operations. It is unclear from the Final EA whether the new CLIFY …
Continue reading ‘Proposed flight path undermines LAX Noise Abatement efforts’ »
Local and Seasonal Meteorological differences change sound propagation. Sound propagation is affected by atmospheric conditions. The FAA’s Environmental Assessment(EA) assumes a homogeneous atmosphere with a single temperature, humidity level and pressure. This doesn’t correlate with real-world conditions. Southern California is subject to persistent meteorological effects, such as inversion layers and prevailing winds. Temperature and humidity are …
Continue reading ‘Meteorological effects change sound propagation.’ »
The use of noise Metrics other than DNL can better tell Communities how airspace changes will affect them. Design of airspace is also a design of noise on the ground and communities needs to be involved in these decisions. People living under a flight path may experience a deleterious effect on their health, negative impacts on …
Continue reading ‘Supplemental noise metrics can help public understand changes’ »
Single factored Environmental variables do not adequately represent climate across the diverse SoCal area. Temperature and humidity change how sound propagates. Noise effects borne by differing meteorological characteristics are not modeled correctly resulting in average noise values being incorrect up to .6dB near airports. The Southern California Study Area is over a large and diverse …
Continue reading ‘Average weather calculation does not represent Noise impacts from overflights’ »