In an article released in the BBC News this morning, they reveal that second hand smoke can play a role in hearing loss. A recent study was conducted and published in the journal, Tobacco Control. The study conducted by researchers from the University of Miami and Florida International University looked at the hearing test results of 3,307 non-smoking US adults that had exposure to second hand smoke.
The results found that tobacco smoke may disrupt blood flow to the small vessels of the ear. The reduction in flow can limit the oxygen received by the auditory organ leading to a build of of toxic waste, eventually causing damage. Second-hand smoke lead to an increased risk of hearing loss across all sound frequencies.
You can read more about this study from BBC News.