1. Pitch: The pitch of the sound will increase. This is because the tension on the rubber band is greater when it is stretched farther, which causes it to vibrate faster. The faster the vibration, the higher the pitch of the sound.
2. Loudness: The loudness of the sound will also increase. This is because the greater tension on the rubber band causes it to vibrate with more energy, which creates a louder sound.
3. Timbre: The timbre of the sound will change as well. The timbre of a sound is determined by the overtones and harmonics that accompany the fundamental frequency. When the rubber band is stretched farther, the overtones and harmonics become more pronounced, giving the sound a different quality or texture.
In summary, stretching a rubber band farther will result in a higher-pitched, louder sound with a different timbre.