Pratique du Shadowing: Why California's musical road sounds terrible - Apprendre l'anglais à l'oral avec la vidéo
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39 phrases
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1
If you drive down a certain stretch of highway in the California desert, you will hear music.
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It's supposed to sound a little bit like this.
3
But instead, it sounds like this.
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That was the musical road of Lancaster, California, and as you may have heard, it's a little bit out of tune.
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A lot of money was spent on that road.
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It was a publicity stunt for a car company who wanted to show off how clever they are.
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And doing the calculations for something like that isn't really difficult.
8
A musical note is a vibration in the air at a particular frequency, and those vibrations can be made by a violin string or synthesized by a computer,
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or, in this case, made by vehicle tyres hitting grooves in the road.
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The closer the grooves are, the faster the vibrations, and the higher the note.
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So take the speed limit, divide by the frequency of the note you want, and that's how often there should be a groove in the road.
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And if people travel at the wrong speed, well, it shouldn't really matter.
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It'll just be like slowing down or speeding up any other bit of music.
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It'll be in the wrong key, but it'll still sound right to most people's ears.
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It won't sound like that mess.
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So, what went wrong?
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At this point, I'm indebted to David Simmons Duffin, an assistant professor of physics at Caltech, whose interests include quantum field theories and playing Baroque violin,
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because he was, as far as I can tell, the very first person to figure out what went wrong.
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And the problem was probably the English language.
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Whoever did the calculations said that the grooves should be so far apart, let's say four inches for the first note, and they meant that there should be a groove every four inches.
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But whoever gave the instructions to the work crew said that the grooves should be four inches apart,
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and that was interpreted as four inches between the end of one groove and the start of the next one.
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itself.
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But your ears definitely do include it.
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The highest note on that section of the William Tell Overture should be one octave higher than the lowest.
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That means the frequency should be doubled and the grooves should be half the distance apart.
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And they are if you don't include the width of the groove itself.
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That error means that every note is distorted not by a fraction of its value, like if you're travelling at the wrong speed, but by a constant amount, by the width of the grooves.
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The higher the note, the greater the effect of that distortion.
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And the result is the mess that you are about to hear for a second time.
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And the really strange part?
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This is the second musical road built in Lancaster, California.
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The first one, built by the car company, was too close to residents who complained about the constant noise, and probably this note here.
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So the city paved over it and rebuilt it to the exact same wrong blueprints.
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That's a take.
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That is a take right there.
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And in order to celebrate that take, I'm going to put my foot down.
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This is an SUV.
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It doesn't do that.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B2 s’appuie sur la vidéo « Why California's musical road sounds terrible ». Les mots qui reviennent le plus souvent : groove, note, road, inches, sound. Cette vidéo contient 39 phrases et 550 mots à répéter en shadowing. La partie parlée dure 3:28. Le locuteur parle à un rythme naturel d’environ 159 mots par minute, proche d’une conversation courante. 83 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| groove nom | /ɡɹuv/ | rainure, sillon |
| vibration nom | /vaɪˈbɹeɪʃən/ | vibration |
| violin nom | /ˌvaɪ.əˈlɪn/ | violon, crincrin |
| calculation nom | /ˌkælkjuˈleɪʃn̩/ | calcul |
| width nom | /ˈwɪtθ/ | grandeur |
| blueprint nom | /ˈbluːˌpɹɪnt/ | cyanotype |
| distort verbe | /dɪsˈtɔːt/ | déformer, distordre |
| indebted adjectif | /ɪnˈdɛtɪd/ | endetté |
| synthesize verbe | /ˈsɪnθəsaɪz/ | synthétiser |
| tyre nom | /taɪə(ɹ)/ | pneu, pneumatique |
| distortion nom | /dɪsˈtɔːʃən/ | distorsion |
| interpret verbe | /ɪnˈtɜː.pɹɪt/ | interpréter |
| stunt nom | /stʌnt/ | cascade, acrobatie |
| rebuild verbe | /ɹiːˈbɪld/ | reconstruire |
| fraction nom | /ˈfɹæk.ʃən/ | fraction |
Les verbes à particule que vous entendrez
| Mot | Prononciation | Sens |
|---|---|---|
| figure out verbe | cerner | |
| show off verbe | crâner, faire le malin | |
| slow down verbe | ralentir, décélérer | |
| speed up verbe | /spiːdˈʌp/ | accélérer |
Prononciation à surveiller
Le locuteur utilise 11 contractions et formes réduites, comme it'll, I'm, doesn't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « th »: width /ˈwɪtθ/, synthesize /ˈsɪnθəsaɪz/
- Les sons « sh » et « zh »: vibration /vaɪˈbɹeɪʃən/, calculation /ˌkælkjuˈleɪʃn̩/, distortion /dɪsˈtɔːʃən/, fraction /ˈfɹæk.ʃən/, instruction /ɪnˈstɹʌkʃən/
Les sons difficiles pour les francophones :
- /r/ anglais — langue recourbée, sans frotter la gorge: groove /ɡɹuv/, vibration /vaɪˈbɹeɪʃən/, blueprint /ˈbluːˌpɹɪnt/, tyre /taɪə(ɹ)/, interpret /ɪnˈtɜː.pɹɪt/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme groove, vibration, violin.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.