"my phone won't fit the rubber cups on this acoustic coupler  "britney had her boyfriend round overnight and i couldn't get to sleep
"1) an old-fashioned telecommunications device that makes digitally-encoded sounds to be received and interpreted through a telephone handset
""my phone won't fit the rubber cups on this acoustic coupler  "britney had her boyfriend round overnight and i couldn't get to sleep" What is the definition of "acoustic coupler"?