📡 Sound Power — measuring your ears
Like an old radio, your ears have a band they can pick up. That band narrows from the top as the years pass — so measuring the highest tone you can still hear works in reverse, and gives you a rough read on how old your ears are.
Human hearing starts out covering roughly 20 Hz to 20 kHz, but the upper end is the part that disappears with age. It is why the mosquito tone teenagers complain about is silent to someone in their forties. The Sound Power app plays a slowly rising tone to find the highest frequency you can still hear, then compares that limit with age-group averages and reports it as a “hearing age”. It is a self-measurement, not a clinical examination.
The English sounds that give non-native ears the most trouble — the voiceless consonants s, th and f — live in the high band. To an ear whose top end has gone soft, those consonants arrive smeared together. Looking after your hearing turns out to be the same job as looking after your English listening. And the band MP3 throws away first is exactly this one.
Measure again after about a month of speed-listening training and a fair number of people find the audible range has widened and the measured hearing age has come down. One learner in his sixties ended up turning his television volume down. The likely reason is that the training stimulates a high band the ear rarely uses any more — but to be honest, we cannot fully explain the physiological mechanism. What we can say is that repeating the measurement moves the number, and that we have watched it happen for ten years.
Sound Power is not a medical device and does not prevent or treat any illness. Hearing age is not a diagnosis; it is a self-measured indicator you can use to gauge your own change, and results vary from person to person. If you are worried about your ears, a clinic comes first — the app is a daily training tool, not a substitute for one.
Three minutes is enough for the test.
Source
Adapted from Q29 of 100 Questions on Daechung English (Oh Seung-jong, 2026) and the chapter “Can hearing age get younger?” in The 30-Day Wave Speed-Listening Miracle. ⚠️ These are experience records based on self-measurement and do not guarantee any medical benefit. For the research on hearing and brain health see [[hearing-dementia]]; for a case see [[superear-other-languages]].
Read the original →※ This article summarizes and restructures the key points of the source above.
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