耳の虫（earworm）とは？曲が頭から離れない理由

Why Do Songs Get Stuck in Our Heads?

Have you ever had a song stuck in your head for an entire day?

Scientists have a name for this experience: an earworm.

The more official term is "involuntary musical imagery."

Almost 90 percent of people get an earworm at least once a week.

Most earworms are not a whole song.

They are usually just a short piece, about 15 to 30 seconds long.

This short piece is often the catchiest part of the song, called the "hook."

So why do these short pieces get stuck in our heads?

Researchers believe the brain uses something called a "phonological loop."

This loop connects the parts of your brain that process sound, memory, and emotion.

Once a melody enters this loop, your brain keeps replaying it, almost like a broken record.

Certain songs, especially ones with a simple but slightly unusual melody, seem to trigger this loop more easily than others.

Repetition also plays a big role.

Songs that repeat the same short phrase again and again tend to stick in our minds.

An earworm can also start because of a word, an image, or even a smell that reminds you of a song.

So how can you make an earworm stop?

One simple method is to listen to the whole song from beginning to end.

Another method is chewing gum, since it seems to interfere with musical memory.

If nothing works, there is still good news.

Earworms almost always fade away on their own, given enough time.