"As for the bracelet Mom wore to the funeral, what I did was I converted Dad's last voice message into Morse code"

 Morse code was invented by Samuel Morse in 1836, and became widely used after the advent of the electric telegraph. According to popular legend, the first message ever sent was 'What hath God Wrought?', which translates as:

.-- .... .- - / .... .- - .... / --. --- -.. / .-- .-. --- ..- --. .... - ..--..

 

Morse Alphabet
Public DomainMorse Alphabet - Credit: Rhey Snodgrass & Victor Camp

You can translate into morse code (and even play it aloud) here

 

Morse code jewelry is available online.