| Karajanagi and the team test stiffness by implanting the gel in calf's larynges, which they get from local slaughterhouses, and attaching them to a synthetic windpipe. |
| Materials and methods: To validate our laryngeal model, five porcine larynges were excised and placed on a test bench consisting of a blower and a laser photoglottometer for measurement of vocal cord vibration. |
| Larynges were excised from three lions and three tigers euthanized for humane reasons due to advanced disease at the Henry Doorly Zoo in Omaha. |
| To test durability, they implanted the gel in dogs, whose larynges are similar to those of humans. |
