Final answer:
EQ8 has 8 frequency bands. Humans can distinguish sounds with a minimum frequency variation of 10 Hz, and the human hearing range is typically 20 Hz to 20,000 Hz. In microwave ovens, a higher frequency like 2560 MHz would produce smaller hot spots due to interference effects. The correct option is D).
Step-by-step explanation:
The student is asking about the number of frequency bands in EQ8, which is a digital equalizer often found in audio software such as Ableton Live. EQ8 has 8 frequency bands, allowing users to adjust frequencies across the spectrum to shape the sound.
Regarding the additional information provided:
Humans need a minimum frequency variation of 10 Hz to distinguish two separate sounds.
The beat frequencies for musical notes played together are calculated by finding the difference between their respective frequencies.
For example, if the musical notes A and C are played together, with frequencies of 220 and 264 Hz respectively, the beat frequency is 44 Hz. For D and F, with frequencies of 297 and 352 Hz, the beat frequency is 55 Hz.
The range of frequencies that humans are capable of hearing typically extends from 20 Hz to 20,000 Hz.
For microwave ovens, the wavelength of a 900 MHz frequency can be calculated using the formula λ = c/f, where λ is the wavelength, c is the speed of light (about 3 x 108 m/s), and f is the frequency.
The same formula applies to the frequency of 2560 MHz. Generally, the higher frequency of 2560 MHz would produce smaller hot spots in food due to interference effects. Option D) is the correct one.