All the SPL meters I've worked with have both A and C weighting. A weighting is measured from 500 Hz to 10kHz. C weighting is measured from 32 Hz to 10KHz. Sounds like you have one that is C weighted, but it should go to 10k. The cheapo Radio Shack one follows the specifications above. Might be that the response starts to diminish after 8kHzk8kHz, so they just stop there.

If you have one that goes to 8k, try running a pure 10k tone and see if it responds. I wonder if they're just listing the prime range, not the full range.

All the SPL meters I've worked with have both A and C weighting. A weighting is measured from 500 Hz to 10kHz. C weighting is measured from 32 Hz to 10KHz. Sounds like you have one that is C weighted, but it should go to 10k. The cheapo Radio Shack one follows the specifications above. Might be that the response starts to diminish after 8kHzk, so they just stop there.

If you have one that goes to 8k, try running a pure 10k tone and see if it responds. I wonder if they're just listing the prime range, not the full range.