Is it true that a lower pitch sound is produced when the vocal cords are relaxed?

Yes, it is true that a lower pitch sound is produced when the vocal cords are relaxed. When the vocal cords are loose and relaxed, they vibrate more slowly, resulting in lower frequency sound waves, which correspond to a deeper pitch. Conversely, when the vocal cords are tense and taut, they vibrate faster, producing higher pitch sounds. This relationship between tension and pitch is fundamental to vocal production.