Why do I sometimes hear a chirping noise while signed into LAM?

This chirping, beeping or whistling sound (depending on how you would describe it) is coming from the chat room and occurs anytime a new post is submitted. You can pull up the chat window from the bottom of any page (click on "Life After Mormonism Chat | # Online"). You are automatically signed into chat upon logging into or registering on LAM. You can pull up the chat application from the bottom of any page or by going clicking "Chat" on the menu bar. From the chat application, you can participate in the public chat, or invite other members to a private chat. You can also mute(speaker icon) or "Go Offline"(green dot/peep icon) from chat here to silence the "chirp". If you sign out of chat, you will remain signed into LAM but will no longer be able to participate or view the chat discussion. Note: If you don't hear the chirp when others post in the chat room, be sure that your sound is enabled, and that your volume is adjusted appropriately.