What is the recommended vent size for individuals with thresholds worse than 70 dB at 250, 500, and 1K Hz?

The recommendation for vent size for individuals with thresholds worse than 70 dB at 250, 500, and 1K Hz is to use either a pressure vent or no vent at all. This guidance is primarily based on the nature of hearing loss and the function of hearing aids in this context.

When a person has significant hearing loss, particularly at the lower frequencies, a larger vent can lead to a substantial reduction in amplification at these frequencies. In cases where the loss is more severe, the goal is often to maximize sound intensity into the ear, which can be hindered by larger venting. Therefore, using a pressure vent or eliminating the vent entirely helps to prevent sound from escaping and ensures that amplified sound reaches the eardrum effectively.

This choice ensures that the hearing aid provides adequate amplification, particularly for the frequencies where the individual demonstrates greater hearing loss, thereby improving their overall hearing experience.