Final answer:
The statement that sound science is based on one-time occurrences is false; sound science requires repeated observations and experiments. The Doppler effect, which affects the observed frequency of sound, requires relative motion, not just motion of the sound source. The speed of sound remains relatively consistent across different frequencies in air.
Step-by-step explanation:
The statement "Sound science is based on one-time occurrences" is false. Sound science and other empirical sciences rely on repeated observation and experimentation to establish principles and laws. For instance, the Doppler effect is observed whenever there is relative motion between a sound source and an observer; it is not limited to occurrences when the source is moving.
Also, the observed frequency does not become infinite even when the source is moving at the speed of sound; this is a misinterpretation of the phenomenon. The speed of sound, represented by V, is V = fλ (where f is the frequency and λ is the wavelength), and it remains relatively consistent across frequencies in open air within the audible range.
Experimental observation in sciences such as physics is key to making cause-and-effect claims, and tested data can only be accepted as reliable after repeated verification. This is true for propositions based on external and internal senses, such as the example: "fire causes burns."
When a moving source of sound approaches a stationary observer, the observed frequency increases and it decreases when the source moves away, due to the compression or stretching of sound waves known as the Doppler effect.