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Updated Appendix F: Frequency response graph interpretation (markdown)

ploopyco 2023-08-25 16:39:50 -04:00
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Appendix-F:-Frequency-response-graph-interpretation.md

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A big thanks to [oratory1990](https://www.reddit.com/r/oratory1990/) for measuring the Ploopy Headphones!
## Measurement Setup
The equipment used to measure the frequency response of the Headphones is as follows:
- GRAS45BC-10 KEMAR head and torso simulator
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- APx515 or APx526 Signal Generator/Analyzer
- APx1701 amplifier
## Measurement Results
We believe that the **Harman AE/OE 2018 Target** represents an ideal sound for headphones, and have tuned the headphones to be close to this target.
The Ploopy Headphones deviate from the Harman Target by an average of **0.66 dB**.
According to S. Olive et al.'s *"A Statistical Model That Predicts Listeners' Preference Ratings of In-Ear Headphones"* study, this deviation means that the Ploopy Headphones have a preference score of **93/100**.
## Big thanks to oratory1990!
oratory1990's full report on the Ploopy Headphones is available [here](https://ploopy.co/wp-content/uploads/2023/08/Ploopy-Headphones.pdf).