[TheOtherHobbes]

Cats don't meow, but they do hiss and yowl at each other. They also nose/face bump. And make specific noises in heat.

When our current cat was in heat before being spayed I recorded the sound on my phone and played it back to her. She looked very confused. Maybe I should try it on other cats to see what happens.

She's also fascinated by one particular jingly wind chime ring tone and will follow it around until she gets bored.