Ear Impression Materials – Ethyl Methacrylate to Silicone

The history of ear impression materials has not been systematically traced, even though what have been described as “custom” earmolds have been reported to at least 18851, implying that some kind of ear impression served as a model. The first report identifying an impression material for the ear (wax) was by Hawksley in 1890.  The Hawksley…

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Open Earmold Hearing Aid Fittings – A Brief History

Open Earmold Hearing Aid Fittings Open earmold fittings (essentially, ear pieces having a single large vent, multiple vents, or tubing alone), are commonly used today to achieve a successful fit for the hearing-impaired population having high-frequency hearing loss (Figure 1).   How and When Did Open Earmold Fittings Come About? It is unlikely that the…

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