Thoughtspike

Thoughtspikes appear to be disposable devices that allow the user to communicate without speaking. Thoughtspikes are pointed on one end, and grow into a larger, trumpet-like shape at the other end. To use, you put the pointy end into your forehead, and it speaks your thoughts through the other end (though it has only been seen translating thoughts into English, it may be able to translate thoughts into any language). Amy and the professor use it to communicate during the approach of a mysterious space ship in 3013.

Quotes
Amy: Why don't they just use a thoughtspike like normal people? (They each put a thoughtspike in their head) Professor Farnsworth: I don't know, Amy.
 * Professor Farnsworth: It seems to be emitting musical tones in an effort to communicate.

Appearances

 * Game of Tones