Mondegreens for normal speech - is there a specific word for them?

Question

I know that the term "mondegreen" (the term used for mishearing a word, coined by author Sylvia Wright when she famously misheard a lyric in The Bonny Earl of Murray) can technically be used for any misheard word, but I found myself wondering lately: does anyone know of a specific term used to describe misheard words outside of song lyrics?

To be clear, I mean if, say, you said to someone

You can't carry that, you have a bad back.

And they thought you said

You can't carry that, you have a backpack.

I haven't been able to find any other terms in my online research, but I'm really curious as to whether there is one. Have at it, StackExchange!

Answer 1

Otosis conveys the meaning you are referring to:

• mishearing or misinterpretation of spoken sounds, also an alteration in word forms due to it.

(M-W)

Origin:

• Mid 19th cent. From ancient Greek ὠτ-, οὖς ear + -osis.

(ODO)

Answer 2

According to Grammarist Sarah Belliston, the word you're looking for is eggcorn. See http://grammarist.com/mondegreens/.