Loneliness, she said—and this will surprise no one—is the want of intimacy.
Who are the lonely? They’re the outsiders: not just the elderly, but also the poor, the bullied, the different.
Teach a lonely person to respond to others without fear and paranoia, and over time, her body will make fewer stress hormones and get less sick from them.
SoX, the Swiss Army knife of sound processing programs.
SoX is a cross-platform (Windows, Linux, MacOS X, etc.) command line utility that can convert various formats of computer audio files in to other formats. It can also apply various effects to these sound files, and, as an added bonus, SoX can play and record audio files on most platforms.