📖 From *WAV Speed-Listening: The 30-Day Miracle*
Ossam’s second book, *WAV Speed-Listening: The 30-Day Miracle* (published July 2026), holds the changes recorded across ten years of teaching hundreds of people. One of them — a trading-company CEO in his 60s — led to two more apps.
A businessman in his 60s importing US chemical products. When direct dealing with the head office began, English became a matter of survival. The meetings he had prepared for, he endured — but the fast talk in the car between stops, and at dinners running two or three hours, none of it came through. By the time he had barely composed one sentence, the topic had moved on, and he had to sit there blankly. Ten years of every method and private tutoring, and each time back to square one.
After a month of Daechung English, not one day missed, his comprehension measured out at double. The cartoon lines given as examples began to come through, and a confidence he had not had appeared. A month on, the hearing age the app measured had grown much younger, the tinnitus he had long suffered eased, and the TV volume he used to keep at maximum he now turned well down.
Daechung English measures three things at the start: hearing age, audible frequency, and English listening. Then, without touching English, you do only Korean speed-listening, 30 minutes a day. Usually within two or three weeks you reach the branch point where 4× is about half audible, and there the same three are measured again. Nearly every time the numbers move — you listened only to Korean, and the English-listening score has risen. The measurement is the anchor that holds down the fact that the change is not a feeling but something that actually happened.
In English, meaning splits on consonant differences of around 0.04 seconds, like b, d, p. A brain trained on Korean blurs that instant. Fast ForWord, the phoneme-training program of neuroscientists Paula Tallal and Michael Merzenich, stretched those fast sounds and then returned them to normal speed, reporting one to two years of language gains in a few weeks; it appeared in *Science* in 1996. Speed-listening runs the opposite way — pull the sound fast, then come back to normal, and that speed feels like slow motion (the interchange effect). The methods are opposite, but both trainings raise “the speed at which hearing processes sound.”
Ossam watched, countless times, people who came to learn English delight that their hearing had improved as a bonus. The only way to bring what happened to hundreds in the classroom to tens of thousands outside it was an app — so after the first app, Daechung English, came a second that measures and trains hearing age, Sound Power, and then a third, Speed Bible. All three use the same heart: the WAV speed-listening engine.
Carried over just as the book puts it — “I am not a doctor.” Hearing age is not a clinical hearing test but the app’s self-measured value; Sound Power is not a medical device that prevents or treats disease; and results vary by person. One thing is certain: for ten years we measured, and each time a person changed, we watched the numbers move.
This piece reconstructs part of the book — the 30-day roadmap and the rest are in the book and the classes.
Source
Reconstructed from Parts 1–2 of Seungjong Oh, *WAV Speed-Listening: The 30-Day Miracle* (Pubple, 2026). Fast ForWord: Tallal & Merzenich, Science 271 (1996) · KBS Special *The Real Reason You Can’t Speak English* (2011). ⚠️ Hearing-related content is an experience record based on self-measurement and does not guarantee medical efficacy. Read together: [[hearing-dementia]], [[wav-speed-listening]].
Read the original →※ This article summarizes and restructures the key points of the source above.