It means the "science of the sound which is made by our speech."

But Brother Stukely had been for some time rendered incapable of speech.

But sweet beyond words had been this speech from the bartender.

Among his friends his speech was anticipated with lively interest.

He has made a speech, and dedicated it to German fame for ever.

On the 5th of February the king attended and delivered the speech from the throne in person.

"I wonder if you are as glad to see me as I am to see you, Grace," was her first speech.

It seemed as if so much soul had never been put into a Saxon speech.

Now the hard-hearted Bella interlards her speech with invective!

There were three candidates to be heard from and his speech was to be the last in order.