3 beeps is a common and universal sound that can indicate various situations, depending on the context. For example, in computing it usually means an error or malfunction has occurred; 3 beeps typically indicates a RAM failure, but may also mean other hardware issues such as CPU failure or BIOS errors. It could also refer to an alarm system alerting you of danger or unauthorized access. In electronic devices like microwaves and washing machines, 3 beeps often signals the end of its cycle; meaning whatever was placed inside is done with its process. Generally speaking however, if you hear 3 beeps anywhere without any visual indication as to why it's making noise, then this should immediately raise suspicion and caution should be taken until further information is known.