PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Not specified Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Not specified Renal: Not specified Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No prior malignancy within the past 5 years and no concurrent malignancy except nonmelanomatous skin cancer or carcinoma in situ of the cervix No clinically significant hearing loss (i.e., hearing loss effects everyday life and/or wears a hearing aide) No other significant medical or psychiatric condition