A large percent of the speech sounds needed to understand communication, like the “f”, “s”, and “th” sounds, are at 3000 Hz and above, a portion of the pitch range often affected for those with aggressive hearing loss.
As we age, we progressively lose our ability to hear high pitch sounds. An infant’s ear can perceive frequencies ranging from 20 Hz (Hertz) to 20,000 Hz the average adult human can hear sounds between 20 Hz and 16,000 Hz. To understand frequency compression, you need to understand the basics of human hearing and hearing aid amplification. “It can make a big difference if we are comparing detection of plural ‘s’ in a controlled laboratory experiment to ratings of perceived speech intelligibility in real-world environments.” How does it work? Alexander explains that results can also vary depending on what criteria were used. …we don’t really know yet who will and who won’t benefit from this technology there are only about a dozen peer-reviewed studies on modern frequency lowering techniques. Furthermore, there is a lack of consistency across studies, and sometimes within the same study, in terms of how the frequency lowering settings were chosen for each research subject.” Part of the reason is that there are only about a dozen peer-reviewed studies on modern frequency lowering techniques. Alexander, an assistant professor of audiology at Purdue University in West Lafayette, Indiana, told Audiology Online: “…we don’t really know yet who will and who won’t benefit from this technology. Other audiologists aren’t quite as enthusiastic about frequency lowering. The technology is excellent for speech in noise, which is the biggest challenge most hearing aid wearers face, Many hearing aid wearers who could benefit from it don’t have it activated.” Questions about effectiveness Different companies have different ways to describe it.
“There are a lot of different names for it,” Senderholm continued, “frequency shifting, frequency compression, sound recover.
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