Measuring a bicycle chain's pitch can be used to identify chain wear and flag the need for a replacement chain and/or cogs and chainrings. Bicycle Chains: Length, Width, What's Best to Buy etc.
Daith piercing. A Daith piercing (pronounced DÃ¤TH) is an ear piercing that passes through the ear's innermost cartilage fold, the crus of the helix. In most areas this piercing is pronounced day-th which can be compared to the word faith, which is nonstandard. The standard pronunciation is doth like goth.
Make sure you are getting the right piercing. Many people confuse the daith piercing the tragus piercing. Understand that this is a bony cartilage piercing that carries a higher risk of pain and infection if not treated properly. Understand that you are trying an unproven therapy, so outcomes may vary greatly.