Final answer:
Increasing the LFF would reduce the intensity of low frequencies, not increase them, and it alters the frequency content by filtering out the targeted lower frequencies. To raise a resonant frequency, you would shorten the air column, such as adding more water to a glass. Inductors filter out high frequencies by having higher reactance at high frequencies.
Step-by-step explanation:
Increasing the low frequency filter (LFF) on a sensory study is likely related to altering the frequency range that the system allows through or detects. In the context of acoustics or electronics, such as in a sound reproduction system, an increase in LFF would technically reduce the intensity of lower frequencies by filtering them out, rather than increase it. However, this would not increase the frequency; rather, it would alter the resulting output to contain fewer of the targeted low frequencies. If a student wants to increase the resonant frequency created by blowing across a half-full glass of water, they would need to shorten the air column inside the glass. This could be achieved by adding more water to the glass, which reduces the space for the air column, thus raising the resonant frequency.
In terms of inductance, an inductor has a higher reactance at higher frequencies, which impedes the current more effectively. Thus, an inductor can be used to filter out high frequencies, not low frequencies. Increasing the size of an inductor in a circuit would strengthen its ability to block or reduce high-frequency signals.