Smith B E
Arch Otolaryngol Head Neck Surg. 1986 Jan;112(1):50-2. doi: 10.1001/archotol.1986.03780010052009.
In vitro airflow resistance calculations were completed for 20 low-pressure voice prostheses (Blom-Singer). Total device resistances ranged from 63.51 to 105.91 cm H2O per liter per second (LPS), with an overall average resistance of 82.04 cm H2O/LPS. Resistance characteristics were compared with those of other commercially available devices.