Shadowing Practice: Testing the world's longest echo - Learn English Speaking with Video
Creating lesson...
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I'm inside one of the Inchendown oil tanks, an old oil storage facility near Inverness in Scotland.
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This tank is 237 metres long, and it's not meant for humans.
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When it was in use by the Royal Navy, all this colossal space would have been filled with fuel oil.
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With these oil tanks, the Royal Navy accidentally created the greatest reverberation chamber in the world.
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Flat surfaces enclosed by solid rock,
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and a chamber big enough that sound takes a whole second or more to go off the far wall and bounce back,
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but still narrow enough that you get lots of reverberation from all the close surfaces as well.
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The construction started in 1938 and it carried on right through the beginning of the war up to around about 1943.
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The Admiralty had decided that they required bomb -proof storage for their oil.
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So they set about building a number of oil tanks across Britain.
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And this, Incheon Down, is one of them.
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The construction required six tanks to be built.
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The entire complex could easily contain 100 ,000 tonnes of fuel oil.
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But one single Royal Navy battleship could drink 5 ,000 tonnes.
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So it could go very, very quickly.
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This is a truly amazing chamber of sound a cathedral of oil and a cathedral of science.
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So now I'm going to shut up for a bit.
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Preston here is going to fire a starting pistol, a very, very loud bang.
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On the screen is a visual display of that sound.
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Different frequencies will reverberate for different amounts of time, so you will see that and hear that.
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And as it gets quieter, we will turn up the level on the microphone, so it's easier for you to hear.
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Right, everyone ready?
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Thank you. so Thank
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you to the Bannerman group for letting us into the tunnels, to Alan, Alan and Preston for helping with everything here,
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to Matt Ray who is behind the camera and who has had some musical experiences over on his channel.
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Go for it. That is terrifying!
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Vocabulary and speaking notes for this lesson
This video has 26 sentences and 337 words to shadow. The speech runs for 3:27. The speaker talks slowly, about 98 words per minute, so there is time to copy every sound. 85% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
15 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| chamber noun | /ˈt͡ʃeɪ̯mbɚ/ | The private room of an individual, especially of someone wealthy or noble. |
| cathedral noun | /kəˈθiːdɹəl/ | The principal church serving as the office (and some as place of residence) of an archdiocese's/a diocese's archbishop/bishop which is symbolized by an… |
| narrow adjective | /ˈnæɹəʊ/ | Having a small width; not wide; having opposite edges or sides that are close, especially by comparison to length or depth. |
| frequency noun | /ˈfɹiːkwənsi/ | The rate of occurrence of anything; the relationship between incidence and time period. |
| bang noun | /ˈbæŋ/ | A sudden percussive noise. |
| tunnel noun | /ˈtʌn(ə)l/ | An underground or underwater passage. |
| accidentally adverb | /ˌæk.sɪˈdɛnt(ə)li/ | In an accidental manner; by chance, unexpectedly. |
| bounce verb | /baʊns/ | To change the direction of motion after hitting an obstacle. |
| pistol noun | /ˈpɪstəl/ | A handgun |
| metre noun | /ˈmiːtəɹ/ | The basic unit of length in the International System of Units (SI: Système International d'Unités), equal to the distance travelled by light in a vacuum in… |
| microphone noun | /ˈmaɪ.kɹəˌfəʊn/ | A device (transducer) used to convert sound waves into a varying electric current; normally fed into an amplifier and either recorded or transmitted over radio. |
| reverberation noun | /ɹiˈvɜː(ɹ)bəɹeɪʃən/ | A violent oscillation or vibration. |
| tonne noun | /tʌn/ | A unit of mass equal to 1000 kilograms. |
| battleship noun | /ˈbætəlˌʃɪp/ | A large capital warship displacing thousands to tens of thousands of tons, heavily armoured and armed with large-caliber guns; now obsolescent and replaced by… |
| colossal adjective | /kəˈlɑsəl/ | Extremely large or on a great scale. |
Phrasal verbs you will hear
| Word | Meaning |
|---|---|
| go off verb | To explode. |
| turn up verb | To show up; to appear suddenly or unexpectedly. |
Pronunciation to watch
- The “sh” and “zh” sounds: reverberation /ɹiˈvɜː(ɹ)bəɹeɪʃən/, battleship /ˈbætəlˌʃɪp/
- Long words — get the stress right: accidentally /ˌæk.sɪˈdɛnt(ə)li/, reverberation /ɹiˈvɜː(ɹ)bəɹeɪʃən/, reverberate /ɹəˈvɜɹbəˌɹeɪt/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like chamber, cathedral, narrow.
What is the Shadowing Technique?
Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.