Cox, Johnson, and Alexander (2012) report cochlear dead regions (DRs) occur when inner hair cells at a given frequency are lost or malfunctioning. Previous publications have suggested hearing-aid high-frequency gain should be attenuated in the presence of high frequency DRs.
Precondition for a VdS approval procedure, among others, is proof of a certified quality management system in accordance with DIN EN ISO 9001 for the manufacturing facility of the product.
Note: As of January 12, 2009, a valid ESTA approval is required for all VWP travelers wishing to travel to the United States. If you do not have authorization via ESTA in advance of your next visit to the United States under the Visa Waiver Program, you may be:1  Denied boarding by the air or sea carrier;ote: As of January 12, 2009, a valid ESTA approval is required for all VWP travelers wishing to travel to the United States. If you do not have authorization via ESTA in advance of your next visit to the United States under the Visa Waiver Program, you may be: 1  Denied boarding by the air or sea carrier;