his voice squeaked

[diamondcutter]

The next morning, when he opened his mouth to say, “Good morning,” nothing came out but a croak. “Guh.” His voice squeaked.
http://files.havefunteaching.com/wo...ird-grade-reading-comprehension-worksheet.pdf

I wonder if it’s common to say his voice squeaked.

 

[teechar]

I don't know about common, but it's possible.

 

[diamondcutter]

Thanks, Teechar.

In the Oxford dictionary, the definition of 'squeak' is this.
to make a short high sound that is not very loud

I think his voice is also a kind of sound.

His voice squeaked. -- A sound made a sound.

Maybe my understanding is wrong.

 

[teechar]

I think you're being too strict. Consider also poetic/literary license, especially where metaphor is used.

You'll find an example of "voice squeaked" in the very dictionary you cited above!
Take a look at entry 1.1 for "squeak" as a verb in this link.
https://www.lexico.com/definition/squeak

 

[emsr2d2]

He either croaked or he squeaked. They're very different sounds.

 

[diamondcutter]

He either croaked or he squeaked. They're very different sounds.

Did the author make a careless mistake?

 

[Charlie Bernstein]

Did the author make a careless mistake?

The author made a word choice. I like it.

 

[tedmc]

I think you could equally well say "he squeaked" but it would be a bit plain.

 

[Tdol]

Did the author make a careless mistake?

That would depend on the noise made.

 

[diamondcutter]

That would depend on the noise made.

I incline to the view that the author made a careless mistake according to the definitions of the two words.

I read this in the Cambridge dictionary.

croak noun.
a deep, rough sound made by a person or animal
https://dictionary.cambridge.org/dictionary/english/croak

squeak verb.
to make a short, very high cry or sound
https://dictionary.cambridge.org/dictionary/english/squeak

I don’t understand how a sound can be deep and high at the same time.

 

[tedmc]

I am inclined...

There is no deep high sound in the definitions.
Croak is low-pitched while squeak is high-pitched.

 

[Skrej]

I incline to the view that the author made a careless mistake according to the definitions of the two words.
I don’t understand how a sound can be deep and high at the same time.

Perhaps it's supposed to mean his voice changed. It started out as a low croak, but then changed into a high squeak. Much like my voice when I was about 14 or so. Or nowadays when I first speak after waking up. It's like puberty again every morning until I can get some water.

Or like this frog's changing croak.