Courage is something you can't be afraid to have.
If this fails (the tape recorder breaks or whatever) I think this is probably a "white noise" sound for her. Most of those sound/relaxation machines - maybe about $15 to $20 have a waterfall setting, it's just a white noise sound too. Works quite well. Also a fan is great (pointed so it doesn't make a person cold) as a white noise source or to cover up distracting sounds.