Deaf aliens interpreting sound waves

I'm writing a story about an alien race that is blind and deaf: They communicate based on touch and scent, and have a tech level generally similar to us.

I'm assuming that they can measure frequency and amplitude of sound and light, even if they can't sense them directly.

Let's say they get access to our broadcasts of TV and radio into space, and they interpret the sound data into essentially a line graph of frequency and amplitude.

How much sophistication would be needed to separate speech from a dog barking, a door closing, or a laugh track, for instance?

I'm not asking if they could figure out what the language says, I'm asking if they could realize sound waves are providing meaningful communication.

This is related to my question here.

posted about 9 years ago

Karen‭

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