What is the approximate fundamental frequency for adult men?

The fundamental frequency for adult men typically ranges from about 85 Hz to 180 Hz. The choice of 100 Hz closely aligns with the lower end of this range, making it a reasonable approximation for the average fundamental frequency observed in adult male voices.

The fundamental frequency is significant as it reflects the pitch of the voice produced by the vibration of the vocal folds during phonation. In adult males, the vocal cords are generally longer and thicker compared to those in females, which contributes to the lower pitch characteristic of men's voices.

In comparison, 150 Hz, while also within a plausible range, tends to fall on the higher end of the scale and may not represent the average as accurately. The choices of 200 Hz and 250 Hz exceed the typical range for adult males, making them less likely options for the approximate fundamental frequency. Hence, 100 Hz is the most accurate approximation among the options provided.