Frequency Lowering For All! – Is There Evidence for this Practice in Adult Fittings?

The manufacturer default settings for a hearing aid fitting are not always the most appropriate settings for the individual. Frequency lowering default settings are a good example, particularly since there has been an abundance of research interest in this area that can inform (impact?) clinical practice. In commercial hearing aids, one of two techniques is used: frequency compression or frequency transposition. Frequency compression is the more common technique.