Yes, the Instant Pot typically makes a hissing or ssshhh sound when it's cooking under pressure. This sound is a result of the steam being released from the vent valve to maintain the desired pressure inside the pot. As the pressure builds up during the cooking process, the steam is forced out through the valve, creating the characteristic sound. It's important to note that the sound may vary depending on the specific model of the Instant Pot, but a hissing or ssshhh sound is generally associated with the release of steam and pressure.