シャドーイング練習: Why California's musical road sounds terrible - 動画で英語スピーキングを学ぶ

練習モードを選ぶ

各モードは全画面の練習ルームで開きます。

39 文

文が短すぎたり長すぎる場合は、Editをタップして調整してください。

If you drive down a certain stretch of highway in the California desert, you will hear music.

It's supposed to sound a little bit like this.

But instead, it sounds like this.

That was the musical road of Lancaster, California, and as you may have heard, it's a little bit out of tune.

A lot of money was spent on that road.

It was a publicity stunt for a car company who wanted to show off how clever they are.

And doing the calculations for something like that isn't really difficult.

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,

or, in this case, made by vehicle tyres hitting grooves in the road.

The closer the grooves are, the faster the vibrations, and the higher the note.

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.

And if people travel at the wrong speed, well, it shouldn't really matter.

It'll just be like slowing down or speeding up any other bit of music.

It'll be in the wrong key, but it'll still sound right to most people's ears.

It won't sound like that mess.

So, what went wrong?

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,

because he was, as far as I can tell, the very first person to figure out what went wrong.

And the problem was probably the English language.

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.

But whoever gave the instructions to the work crew said that the grooves should be four inches apart,

and that was interpreted as four inches between the end of one groove and the start of the next one.

itself.

But your ears definitely do include it.

The highest note on that section of the William Tell Overture should be one octave higher than the lowest.

That means the frequency should be doubled and the grooves should be half the distance apart.

And they are if you don't include the width of the groove itself.

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.

The higher the note, the greater the effect of that distortion.

And the result is the mess that you are about to hear for a second time.

And the really strange part?

This is the second musical road built in Lancaster, California.

The first one, built by the car company, was too close to residents who complained about the constant noise, and probably this note here.

So the city paved over it and rebuilt it to the exact same wrong blueprints.

That's a take.

That is a take right there.

And in order to celebrate that take, I'm going to put my foot down.

This is an SUV.

It doesn't do that.

アプリをダウンロード

流暢に話すために必要なすべて

AI発音採点文ごとに採点

IPA練習すべての音をマスター

単語学習自分の単語帳を作る

単語ゲーム遊びながら覚える

QRをスキャン

Download on theApp Store Get it onGoogle Play

同じチャンネル

FOR YOU

このレッスンの語彙とスピーキングのポイント

このB2レベルのスピーキングレッスンは、動画「Why California's musical road sounds terrible」を教材にしています。繰り返し出てくる語は次のとおりです：groove, note, road, inches, sound。この動画には、シャドーイング用の文が39文、単語が550語あります。音声の長さは3:28です。話す速さは1分あたり約159語で、日常会話に近い自然なペースです。単語の83%は英語の頻出3,000語に含まれます。残りは練習の前に確認しておきましょう。

この動画の重要語彙

動画の中で特に難しい単語15語を、発音と意味つきで紹介します。

単語	発音	意味
groove 名詞	/ɡɹuv/	溝
vibration 名詞	/vaɪˈbɹeɪʃən/	振動
violin 名詞	/ˌvaɪ.əˈlɪn/	バイオリン, 小提琴
calculation 名詞	/ˌkælkjuˈleɪʃn̩/	計算
width 名詞	/ˈwɪtθ/	幅, 巾
blueprint 名詞	/ˈbluːˌpɹɪnt/	青写真
distort 動詞	/dɪsˈtɔːt/	歪める, 曲げる
octave 名詞	/ˈɑktɪv/	オクターブ, 八度
synthesize 動詞	/ˈsɪnθəsaɪz/	総合する
tyre 名詞	/taɪə(ɹ)/	タイヤ
interpret 動詞	/ɪnˈtɜː.pɹɪt/	解説する
stunt 名詞	/stʌnt/	無茶
rebuild 動詞	/ɹiːˈbɪld/	建て直す, 再建する
fraction 名詞	/ˈfɹæk.ʃən/	断片
publicity 名詞	/pʌbˈlɪsɪti/	宣伝, 広報

動画に出てくる句動詞

単語	発音	意味
show off 動詞		見えをはる, 見せようとする
slow down 動詞		遅らせる
speed up 動詞	/spiːdˈʌp/	スピードを出す

注意したい発音

話し手はit'll, I'm, doesn'tなど、短縮形や弱形を11回使っています。聞こえたとおりの短い形で発音しましょう。

「th」の音: width /ˈwɪtθ/, synthesize /ˈsɪnθəsaɪz/
「sh」と「zh」の音: vibration /vaɪˈbɹeɪʃən/, calculation /ˌkælkjuˈleɪʃn̩/, distortion /dɪsˈtɔːʃən/, fraction /ˈfɹæk.ʃən/, instruction /ɪnˈstɹʌkʃən/

日本語話者が苦手な音：

/r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: blueprint /ˈbluːˌpɹɪnt/, rebuild /ɹiːˈbɪld/
/v/ — /b/ にならないように、上の歯を下唇に当てる: groove /ɡɹuv/, vibration /vaɪˈbɹeɪʃən/, violin /ˌvaɪ.əˈlɪn/, octave /ˈɑktɪv/, divide /dɪˈvaɪd/
子音の連続 — 間に母音を入れない: groove /ɡɹuv/, calculation /ˌkælkjuˈleɪʃn̩/, width /ˈwɪtθ/, blueprint /ˈbluːˌpɹɪnt/, stunt /stʌnt/

この動画での練習方法

まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
自分の声を録音して元の音声と比べます。groove, vibration, violinなどの単語に特に注意しましょう。

シャドーイングとは？英語上達に効果的な理由

シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: Why California's musical road sounds terrible - 動画で英語スピーキングを学ぶ

練習モードを選ぶ

アプリをダウンロード

同じチャンネル

Why Britain Uses Separate Hot and Cold Taps

The secret underground pipeline across Britain

Why robots still can't pick strawberries

How much helium does it take to lift a person?

How many robots does it take to run a grocery store?

Making an international standard cup of tea

The world's most frustrating work of art

Will YouTube Ever Run Out Of Video IDs?

The US-Canada border splits this road down the middle

This 1970s tank simulator drives through a tiny world

How can you legally fly a plane designed in 1910?

The never-used road where the BBC crash cars

If Educational Videos Were Filmed Like Music Videos

This Video Is 2D And 3D Simultaneously: the Pulfrich Effect

This 100-year-old ride must never change again.

I get excited about &.

Flying a plane badly, on purpose.

Testing the world's longest echo

Thomas, a tank engine, is not Thomas the Tank Engine.

おすすめ動画

Why a Song Gets Stuck in Your Head

Lesson Eight: Placement of the Orchestra, Leonard Slatkin's Conducting School

You've (Likely) Been Playing The Game Of Life Wrong

Why Hearing Aids Sound Tinny (And How to Fix Them)

B2 English Listening Practice - U.S. Geography

Why is the English Language So Standardized — Ocean Vuong

Great Moments in Unintended Consequences: Yosemite Permits, Italy Superbonus, Salary Caps (Vol. 22)

Kurt Cobain [Nirvana] On musical theory & musicianship

How to Speak so That People Want to Listen - Julian Treasure

Sound More Like A Native Speaker in English (4 Easy Fixes)