This recent study by SARDESAI MG, TAN AK, & FITZPATRICK M. of the Department of Otolaryngology, Queen's University, Kingston, Ontario has the fetching title of "Noise-induced hearing loss in snorers and their bed partners." Their conclusion, that "there may be a relationship between snoring and noise-induced hearing loss in the bed partners of chronic snorers" was arrived at after studying a selection of chronic snorers and their bed partners, aged 35 to 55. Seems there was nothing conclusive suggesting hearing loss in the snorers. But their partners -- now there's a different story.
"[A]ll four bed partners of snorers in our study demonstrated a unilateral high-frequency pattern of hearing loss consistent with noise-induced hearing loss. Furthermore, the affected ear in every case was the one that was claimed to be chronically exposed to snoring noise."
Read all about it at your local medical library in the Journal of Otolaryngology, 2003;32(3):141-5