Single-use heating packs may produce noise during the heating process. This occurs because these heating packs operate on the principle of a chemical reaction to generate heat, a process that often involves the production of gases and liquids.

As these substances are released, they can create sounds.

Additionally, mismatched heating power can lead to unstable current flow, which might also cause noise.

Poor usage environments can also affect the quality and longevity of single-use heating packs, potentially resulting in noise issues.

Overall, when using disposable heating packs, it is crucial to prioritize safety and to follow the correct operating procedures to ensure they function properly without emitting unnecessary noise.