Field Evaluation of Reflected Noise from a Single Noise Barrier (2018) / Chapter Skim
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Pages 139-144
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From page 139... ...
141 3.15 kHz bands and in the 250 Hz to 500 Hz bands, although the results are inconsistent. The results are more mixed and lower in magnitude for the sound-absorbing barriers.
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142 • For Type II noise barrier retrofit projects on existing highways and for Type I highway widening projects, true before/after measurement studies (i.e., using the same site before and after barrier installation, as opposed to using an equivalent before site) should be done when noisesensitive receptors are present on the opposite side of the highway that do not qualify for a barrier.
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From page 141... ...
143 (Hughesville, Maryland)
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144 results of such surveys could be used to estimate the true extent of the problem of annoyance with single barriers. Key factors to be explored are the relations of distance, site lines, time of day, and most importantly, listener location if or when the listener is annoyed.
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From page 143... ...
145 References 1.
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