#!/bin/bash

while :; do
    # Delay between beeps (ms)
    # Peep frequency (Hz)
    # Beep length (ms)
    # Number of repetitions
    beep -D $(shuf -i 20-5000 -n 1)    \
         -f $(shuf -i 0-20000 -n 1)    \
         -l $(shuf -i 10-500 -n 1)     \
         -r $(shuf -i 1-5 -n 1)

    # Gap (seconds)
         sleep $(shuf -i 1-5 -n 1)
done