title: Speaking tubes for bedside use.
authors.affiliation: Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins Hospital, Baltimore, MD 21203-6402, USA.
authors.forename: M
authors.initials: M
authors.lastname: Armstrong
authors.forename: P L
authors.initials: PL
authors.lastname: Efros
mesh_terms: D004867:Equipment Design; D006310:Hearing Aids; D006761:Hospitals