People born profoundly deaf, or who become so in early childhood, may well not develop intelligible speech.

To communicate with others, someone who knew him well would translate his speech into intelligible speech.

One was low, a murmur which seldom arose to intelligible speech.

He has given you a fine form, but it lacks intelligible speech.

A digital sound recorder can typically store around 200 hours of clearly intelligible speech in 640MB.

How is it possible for you to suddenly acquire the ability to produce intelligible speech?

On the second try he managed slurred but intelligible speech.

However, surgery does not guarantee perfect or 100% intelligible speech.

There is, generally speaking, some incomprehensible whispering but usually no intelligible speech.

At a receiver on the island, a powerful amplifier would raise that whisper to intelligible speech.