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• 1 <br /> In the context of airport noise , hearing damage should not be a <br /> problem for neighbors . At an airport , noise levels vary widely from one <br /> minute to the next . Except for line crew members , no one at an airport <br /> or in the surrounding community is exposed to steady high levels of <br /> sound . Two recent studies [ 1 , 2] conclude that there is little risk of <br /> hearing loss from exposure to aircraft noise in nearby Communities . <br /> Speech Interference <br /> Of all the effects of noise , people recognize and understand speech <br /> interference best . When noise masks the sounds of conversation , <br /> telephone calls , or radio or TV listening , it has interfered with <br /> speech. The degree of speech interference depends on several factors - <br /> how loud the speaker' s noise is , how far he is from his listener , <br /> whether the conversation is indoors or outdoors , what is the level of <br /> the interfering noise , and whether that noise is Constant or <br /> intermittent . <br /> fAl <br /> At airports , noise from operations can interfere with speech for <br /> brief periods . Figure 9 indicates the sound levels of aircraft that <br /> will cause speech interference [ 3 ] . The severity of the interference is <br /> related directly to how long the interference lasts . <br /> 2'1 <br /> Y <br /> -fit ,e:K h . q.:C:';.�7n; _.: c _ .• .,.n. � .__., <br />