Prática de Shadowing: Why California's musical road sounds terrible - Aprenda a falar inglês com vídeo
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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.
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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.
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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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Vocabulário e dicas de fala para esta lição
Esta aula de conversação de nível B2 usa o vídeo “Why California's musical road sounds terrible”. As palavras que mais se repetem: groove, note, road, inches, sound. Este vídeo tem 39 frases e 550 palavras para praticar shadowing. A fala dura 3:28. O falante fala em ritmo natural, cerca de 159 palavras por minuto, próximo de uma conversa do dia a dia. 83% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.
Vocabulário principal deste vídeo
As 15 palavras mais avançadas do vídeo, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| groove substantivo | /ɡɹuv/ | ranhura, sulco |
| vibration substantivo | /vaɪˈbɹeɪʃən/ | vibração |
| violin substantivo | /ˌvaɪ.əˈlɪn/ | violino, rabeca |
| calculation substantivo | /ˌkælkjuˈleɪʃn̩/ | cálculo |
| width substantivo | /ˈwɪtθ/ | largura |
| blueprint substantivo | /ˈbluːˌpɹɪnt/ | cianotipo |
| distort verbo | /dɪsˈtɔːt/ | distorcer, deformar |
| indebted adjetivo | /ɪnˈdɛtɪd/ | endividado |
| octave substantivo | /ˈɑktɪv/ | oitava |
| synthesize verbo | /ˈsɪnθəsaɪz/ | sintetizar |
| tyre substantivo | /taɪə(ɹ)/ | pneu |
| distortion substantivo | /dɪsˈtɔːʃən/ | distorção |
| interpret verbo | /ɪnˈtɜː.pɹɪt/ | interpretar |
| stunt substantivo | /stʌnt/ | proeza |
| rebuild verbo | /ɹiːˈbɪld/ | reconstruir |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| figure out verbo | descobrir, deduzir |
| show off verbo | mostrar-se, jactar-se |
| slow down verbo | desacelerar |
Pronúncia para ficar de olho
O falante usa 11 contrações e formas reduzidas, como it'll, I'm, doesn't. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “th”: width /ˈwɪtθ/, synthesize /ˈsɪnθəsaɪz/
- Os sons de “sh” e “zh”: vibration /vaɪˈbɹeɪʃən/, calculation /ˌkælkjuˈleɪʃn̩/, distortion /dɪsˈtɔːʃən/, fraction /ˈfɹæk.ʃən/, instruction /ɪnˈstɹʌkʃən/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: blueprint /ˈbluːˌpɹɪnt/, distort /dɪsˈtɔːt/, indebted /ɪnˈdɛtɪd/, interpret /ɪnˈtɜː.pɹɪt/, stunt /stʌnt/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como groove, vibration, violin.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.