Join Date: Jul 2010
Location: Aalesund, Norway
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Occasionally people report issues with loud, harsh, annoying sound occuring in the midrange, often blamed on horns or waveguides.
I have not really devoted any attention to this, as they seemed to relate to faulty horn/waveguide/cd-designs.
Not until I recently notice that some times dialogue scenes can be annoyingly loud and unpleasant to listen to.
These problems seems to be lower in frequency - below the cf for the wg/horn.
Regardless what is causing it, it will be possible to quantify the problem as something that can be measured and analyzed, and thus, it can also be fixed - for all speaker designs.
I think this can be either a frequency response issue, or time related (ringing/resonance).
My assumptions are based on these experiences:
- Dialogue in some movies can some times be so loud that it gets very unpleasant, occurs somewhere in the 300Hz..1KHz range.
- It is definitely not related to any waveguide or horn, as this speaker does not have any wg/h operating in this frequency range.
- Even playing at -6db can be slightly unpleasant (system is calibrated more on the low side, so this means -6dB or a little lower)
- It is not distortion related - lots of headroom left at this level, and the dialogue is nowhere near 0dB (at least, it should not be..)
- Speaker in-room is reasonably flat
- Room has reasonable acoustic properties
- Speaker has reasonable headroom (I have a tendency to end up listening to music at +6dB on these, still sounds even better.)
If this is to be investigated further, the process would be:
1. Measure the freq spectrum of the dialogue scenes that causes the too-loud issue, to determine frequency and level.
2. Analyze speaker in-room-at-lp freq response compared to (1.) to see if the issue is likely to be freq response related
3. If not (2.), then analyze for time related issues
4. If neither, it is simply too loud. (Solution: ear-plugs..)
Would be interesting to hear what others think - regardless if you have experienced this or something similar.
My audio blog at kvalsvoll.blogspot.com
- from simple set-up guides and tips to investigations on audio related issues.