20Q: Frequency Lowering Ten Years Later - Evidence for Benefit

1. How would you describe the current state of clinical research about frequency lowering? Highly variable and changing rapidly. As highlighted in Josh Alexander’s 20Q of last month, all of the major hearing aid companies now offer some kind of frequency lowering algorithm in their products or are developing new iterations of their previous algorithms. My colleagues and I published an evidence-based systematic review of frequency lowering as a signal processing strategy for children back in 2012 and identified nine studies that met the inclusion criteria up through 2011 (McCreery, Venediktov, Coleman, & Leech, 2012). Just since 2011, the number of studies that would be included under the same search criteria is around 20.

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