And Ethelred uplifted his axe, and struck the head of the dragon, which fell before him with a shriek so horrid and harsh... like whereof was never before...

13 seconds sound clip from the The Fall of the House of Usher (Escape) classic radio play.

You can hear this line at 00:24:21 in the radio play.

Quote context

[...]

- Why do you stop?

- Why, that's... that's strange. I fancied I just heard the very sound I read about.

- Let us say it was caused by the storm. Pray continue.

- Oh, yes, the storm. Of course.

- But Ethelred, upon entering the door, was amazed to perceive no sign of the evil hermit...

- But, instead, a dragon of prodigious and scaly demeanor, which sat on guard before a shield of shining brass.

- And Ethelred uplifted his axe, and struck the head of the dragon, which fell before him with a shriek so horrid and harsh... like whereof was never before...

- What sound is that?

- Sound? The shriek of a dragon, my friend. Read on.

- I, er... Very well.

- And now, the champion, bethinking himself of the shield of brass, approached across the silver floor to where the shield hung upon the wall.

- But the shield, not waiting for his coming, loosed and fell upon the silver floor with a mighty great...

[...]