Back to topics

Why can ten more decibels mean ten times the sound intensity?

A decibel scale does not increase like a ruler. For sound intensity, a 10-decibel increase represents a tenfold ratio, while perceived loudness is a separate question about hearing.

3–5 min

Questions you could explore

  • Why is a logarithmic scale useful across a wide range of intensities?
  • How do intensity, pressure, and loudness differ?

Start reading

Ready to try your ideas aloud?

Your topic carries over. Record up to 2½ minutes, depending on your plan.

Physics

Why metal can feel colder than wood

A metal handle and a wooden tabletop can share a room temperature yet feel quite different. The clue lies in the exchange of heat between your hand and the surface, which is not the same thing as measuring temperature.

5–7 min

Why metal can feel colder than wood

Physics5–7 minA metal handle and a wooden tabletop can share a room temperature yet feel quite different. The clue lies in the exchange of heat between your hand and the surface, which is not the same thing as measuring temperature.

Physics

How can headphones fight noise with more sound?

A steady engine hum can fade when noise cancellation switches on, while a nearby voice remains noticeable. The electronics and the physical ear covering do different jobs, and neither makes every sound disappear.

4–5 min

How can headphones fight noise with more sound?

Physics4–5 minA steady engine hum can fade when noise cancellation switches on, while a nearby voice remains noticeable. The electronics and the physical ear covering do different jobs, and neither makes every sound disappear.

Physics

How can a ship made of steel float?

A solid piece of steel sinks, yet a steel ship can carry people and cargo. Its hollow shape changes how much water the whole vessel can push aside, making the material alone an incomplete explanation of floating.

3–5 min

How can a ship made of steel float?

Physics3–5 minA solid piece of steel sinks, yet a steel ship can carry people and cargo. Its hollow shape changes how much water the whole vessel can push aside, making the material alone an incomplete explanation of floating.

Why can ten more decibels mean ten times the sound intensity? | Speech Topic | speaking.app