I imagined this, and asked you your thoughts about the possibility and the arousing resulting from this fantasy.
You need for this two mini or micro microphones that you will place with surgical tape close of both hearts,
you will connect the leads of the two microphones to an amplifier each microphone on one side,
by example she on the left channel and him on the right channel,
the two loudspeaker will be positionned on each side of the bed,
so the lovers can ear the sound of their loving heart
A usual pair of loudspeakers that you connect to your laptop and to the powerwall socket will be fine,
for the microphones you connect them to your laptop to,
and you have the possibility to record your love session.