private void set_new_delay_between_exchanges()
{
if (chatter_freq == 1) secs_between_exchanges = rand.Next(180, 301);
else if (chatter_freq == 2) secs_between_exchanges = rand.Next(90, 181);
else if (chatter_freq == 3) secs_between_exchanges = rand.Next(60, 91);
else if (chatter_freq == 4) secs_between_exchanges = rand.Next(30, 61);
else if (chatter_freq == 5) secs_between_exchanges = rand.Next(10, 31);
if (debugging) Debug.Log("[CHATR] new delay between exchanges: " + secs_between_exchanges.ToString("F0"));
}