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Updated Appendix H: Frequency response graph interpretation (markdown)

ploopyco 2023-08-25 16:33:02 -04:00
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Appendix-H:-Frequency-response-graph-interpretation.md

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[We provide a frequency response measurement here](https://ploopy.co/wp-content/uploads/2023/02/HD6XX-Ploopy-FR.jpg) that we believe is representative of the overall sound quality of our Headphones. This appendix will explain what the graph means and what information it includes.
[We provide a frequency response measurement here](https://ploopy.co/wp-content/uploads/2023/08/fr.png) that we believe is representative of the overall sound quality of our Headphones. This appendix will explain what the graph means and what information it includes.
## Comparative measurement
A big thanks to [oratory1990](https://www.reddit.com/r/oratory1990/) for measuring the Ploopy Headphones!
To provide context for the provided measurement, the Ploopy Headphones aren't measured independently. Rather, we contrast it with a measurement for the Sennheiser HD6XX.
The equipment used to measure the frequency response of the Headphones is as follows:
In the graph, the blue line is the Ploopy Headphones, and the grey line is the Sennheiser HD6XX.
- GRAS45BC-10 KEMAR head and torso simulator
- GRAS KB5000/5001 anthropometric pinnae
- APx515 or APx526 Signal Generator/Analyzer
- APx1701 amplifier
Given that the frequency responses for the HD6XX is well-known, accurate comparisons can be made between "official" frequency response graphs for the HD6XX and our measurement.
## Our measurement setup
![](https://lh3.googleusercontent.com/pw/AMWts8CITKxpBVBhTt6fj6gn7ws0x2eHrGuNe22_swZ__h4xTjkZaj_p1tKYA4x-uqvDzL1zcrTPoKMGG_TazVd-0Tckb9p38EUJyLI_D1kbzmOk51f9uXLg4Pnq4NXqCh9YYiM9jJZcJiO-yvsXrOB6SCO8=w1470-h955-no?authuser=0)
For information on how we measured the frequency response, please see [[Appendix F: Frequency response testing methodology]].
oratory1990's full report on the Ploopy Headphones is available [here](https://ploopy.co/wp-content/uploads/2023/08/Ploopy-Headphones.pdf).