There is no good excuse for audiologists to ignore EHF testing. This article from 2017, 'Benefits of Extended High-Frequency Audiometry for Everyone' makes that abundantly clear.
https://journals.lww.com/thehearing...Extended_High_Frequency_Audiometry_for.8.aspx
This myth-busting section makes some very good points:
"Our audiometers/earphones only work up to 8 kHz."
Time to update your equipment. Modern audiometers allow testing up to at least 12.5 kHz. When updating tools, insist on getting an audiometer with a capability of up to 16 kHz (20 kHz for pediatrics). Norms for EHF hearing are available for professional headphones."
"There is no evidence that EHF is useful."
There is substantial evidence, old and new, that when EHF hearing is lost, so is optimal hearing. In fact, EHF may be the single most important source and the most easily measured index of hidden hearing loss (including cochlear synaptopathy, which are hearing difficulties that occur despite having normal audiograms."
"This will extend our testing time."
Not necessarily. Here are two ways we could make up time for EHF testing. First, eliminate bone conduction at 4 kHz. The data are of limited value and false air-bone gaps occur. Second, eliminate speech reception thresholds. They provide little information in a reliable patient. If the schedule is tight, you could simply add one EHF (e.g., 12 kHz) to the normal test frequencies."
How do audiologists get away with peddling the opposite of this? Are they not required to do some sort of CPD?
Other great points made in this article:
"EHF testing can open doors to further diagnostic understanding. Be bold and think not about the challenges, but about the opportunity."
- "Early warning. Knowing that you have EHF loss would be a great wake-up call, for active monitoring, prevention (e.g., ear protection), and intervention (below)."
- "Understanding unexplained difficulty. Middle-aged people frequently have listening difficulties that are unexplained by current audiological practice. A finding of EHF loss would provide at least a partial explanation."