second sound

Questions

What does second sound mean?

A wave of fluctuating temperature or entropy propagated in the superfluid phase of liquid helium.

How to pronounce second sound

1. Open the pronunciation page — Open the Speakur entry for “second sound”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “second sound”.
4. Repeat and practice — Say “second sound” aloud, matching stress and vowels until it feels natural.