Temperature and the environment can really affect how metal and plastic mouthpieces work for brass instruments. This often creates problems for musicians.

Metal Mouthpieces:

• Temperature Sensitivity: Metal mouthpieces can get really cold or really hot. This can make it uncomfortable for the player and can also change how they hold their mouth when playing.
• Condensation: When moisture builds up, it can make the metal tarnished, which can hurt the sound quality.

Plastic Mouthpieces:

• Heat Expansion: Plastic mouthpieces can become too soft or even bend when it's really hot. This makes it hard to play consistently.
• Lack of Durability: They might crack or break if they are used in tough conditions.

To deal with these problems, musicians should try to buy good quality mouthpieces, clean them often, and change their playing environments whenever they can. Taking care of the equipment and being aware of these challenges can help ensure good performance, no matter the weather.