The couple began dating in the summer of 2012 as the Daughters singer prepared to undergo surgery to remove a granuloma from his vocal cords that August (12).
His recovery required him to not talk for four months and he had to resort to using an Apple iPad tablet to express his thoughts and feelings with friends and family - and that included his new girlfriend, Perry.
During a joint appearance with Mayer on The Ellen DeGeneres Show on Friday (20Dec13), the Roar singer explained, "I understood that he couldn't talk, and the only way he could communicate was through an iPad."
Perry stood by her man as he worked on making his music comeback, and after a brief split earlier this year (13), they are now stronger than ever.
However, the pop star admits they rarely make much noise when they are spending time together at home because their jobs require both musicians to preserve their voices.
She said, "Some days I have to go on complete vocal rest, like no anything, no whispering. Whispering is actually really bad. There's just a lot of silence in our house most of the time."
When comedienne DeGeneres suggests the couple start playing drawing game Pictionary to communicate, Perry quipped, "We should just learn sign language."