Final answer:
Running toward the orchestra at a concert will result in an increased frequency of sound due to the Doppler Effect, which causes a higher-pitched sound as you move closer to the sound source.
Step-by-step explanation:
If you quickly run toward the orchestra at a concert, the frequency of the sound you will hear will be increased. This is because of the Doppler Effect, which describes the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.
When you move towards a source of sound, the wavelengths you encounter become shorter, because you are encountering each wave crest in a reduced amount of time compared to if you were standing still. As a result, the frequency that you perceive is higher, and consequently, you would hear a sound with a higher pitch.