Fig 1.
Study design of aggregated noise measurements by exposed homes vs. controls, location (indoors vs. outdoors), and time of day (daytime vs. nighttime).
Fig 2.
Twenty-four hour A-weighted noise levels indoors and outdoors (Ldn, indoor, Ldn outdoor) for each home (dBA) by distance.
aOutdoor measurements for Control homes 2 and 3 are similar and thus overlap. bThe 55 dBA dashed line denotes the 24-hour EPA recommended limit for outdoor noise level to prevent activity interference and annoyance. The 45 dBA dashed line denotes 24-hour EPA recommended limit for indoor noise level to prevent activity interference and annoyance. cLdn, outdoor for house 7 and 8 is not included in the figure because equipment failure prevented us from measuring for the full 24-hours.
Table 1.
Summary statistics for 24-hour A-weighted noise levels (dBA) by proximity to nearest compressor station stratified by location within home (indoors vs. outdoors).
Table 2.
Summary statistics for A-weighted indoor noise levels (dBA) stratified by distance and time of day.
Table 3.
Summary statistics for A-weighted outdoor noise levels (dBA) stratified by distance and time of day.