A

Step 1: Understand the terms 'pitch' and 'quality'.
Pitch is determined by the frequency of the sound: higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches.
Step 2: Analyze the frequencies involved. The sound produced has a frequency of 500 Hz. This frequency is well within the hearing range of both men; thus, they can hear it.
Step 3: Since both men are hearing the same frequency of 500 Hz, they both perceive the same pitch.
Step 4: However, 'quality' refers to the timbre of the sound, which can depend on various factors including the medium, the environment, and the hearing capabilities of the individuals. As individual hearing capabilities may affect how they perceive the sound, it's reasonable to say they may perceive it differently in terms of quality.
Conclusion: Therefore, both men will hear sounds of the same pitch (500 Hz) but potentially different quality based on their hearing ability.
Therefore, the correct answer is A.