tadda
Well-Known Member
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I thought this might be useful for those interested in how to set up the sound system equalizer to optimize sound quality...The EQ setup and results shown in this thread were done after implementing some much needed design improvements to OE Subwoofer System...
How to Improve OE Subwoofer Quality and Eliminate Vibrations
There are actually a few variables / steps that need to be considered when making EQ adjustments...
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1 - My hearing response curve was measured using a Hearing Test app and considered just for reference:
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2 - Equal loudness curves (loudness perception) need to be taken into consideration...Equal-loudness contours describe the perceived loudness of a sound in relation to its frequency for human listeners...The ear is not equally sensitive to all frequencies, particularly in the low and high frequency ranges.
Further explanation of equal loudness / psychoacoustic effects linked below:
Psychoacoustics - How We hear
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3 - Initial analyzer test results are measured with a smart phone using Sound Analyzer App and pink noise reference .wav file played through the sound system...I also use a higher quality external Omindirectional Microphone rather than using the phones built in directional mic...(Remember to turn off all sound effect / enhancements within the smart phone such as dolby atmos, adaptive sound, and set phone EQ to normal or flat)...
The OE audio equalizer (along with broad bass and treble) should be set to a flat / "0" response at a prefered listening volume...No adjustments are made at this point...
This test identifies all the peaks, dips, and nulls in the sound environment that will need to be compensated for...
-----------------------------------------------------
4 - Final analyzer test results are measured with RTA analyzer app using pink noise reference .wav file and adjustments to the curve are then made to EQ settings using a JBL House Curve as a reference....Again, this was done again at prefered listening volume...
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5 - The Harman house curve (below) is taken into consideration when making the final EQ curve adjustments...
Why a house curve? When you have flattened out the analyzer’s display curve and corrected all the dips and nulls, you’re still not done with the EQ adjustments. If you play music through your system at this point, you probably won't be very pleased with the results. You also have to compensate for other variables as mentioned earlier which includes a very important psychoacoustic effect (see Fletcher Munson equal loudness curves).. In short, a flat response will not sound so great to most people...
Tip: The broad bass and treble settings are adjusted last after corrections / changes are made to the curve using the 7 individual EQ frequency settings...
----------------------------------------------------
6 - Here are my final EQ settings after taking all variables (environment, hearing, psychoacoustic effects, and preferences) into account...
And here are my current audio settings*:
*Note that these are my new settings after I did some some much needed improvements to current OE Subwoofer system...
How to Improve OE Subwoofer Quality and Eliminate Vibrations
How to Improve OE Subwoofer Quality and Eliminate Vibrations
There are actually a few variables / steps that need to be considered when making EQ adjustments...
- Ear / Hearing Response
- Sound Space / Environment
- Psychoacoustic Effects (Understanding Equal Loudness Perceptions)
- Personal Music and Sound Preferences
- Smart Phone
- Hearing Test app
- Sound Analyzer App
- Pink Noise Reference .wav File
- Omindirectional Microphone
------------------------------------------------------
1 - My hearing response curve was measured using a Hearing Test app and considered just for reference:
------------------------------------------------------
2 - Equal loudness curves (loudness perception) need to be taken into consideration...Equal-loudness contours describe the perceived loudness of a sound in relation to its frequency for human listeners...The ear is not equally sensitive to all frequencies, particularly in the low and high frequency ranges.
Further explanation of equal loudness / psychoacoustic effects linked below:
Psychoacoustics - How We hear
-----------------------------------------------------
3 - Initial analyzer test results are measured with a smart phone using Sound Analyzer App and pink noise reference .wav file played through the sound system...I also use a higher quality external Omindirectional Microphone rather than using the phones built in directional mic...(Remember to turn off all sound effect / enhancements within the smart phone such as dolby atmos, adaptive sound, and set phone EQ to normal or flat)...
The OE audio equalizer (along with broad bass and treble) should be set to a flat / "0" response at a prefered listening volume...No adjustments are made at this point...
This test identifies all the peaks, dips, and nulls in the sound environment that will need to be compensated for...
-----------------------------------------------------
4 - Final analyzer test results are measured with RTA analyzer app using pink noise reference .wav file and adjustments to the curve are then made to EQ settings using a JBL House Curve as a reference....Again, this was done again at prefered listening volume...
---------------------------------------------------
5 - The Harman house curve (below) is taken into consideration when making the final EQ curve adjustments...
Why a house curve? When you have flattened out the analyzer’s display curve and corrected all the dips and nulls, you’re still not done with the EQ adjustments. If you play music through your system at this point, you probably won't be very pleased with the results. You also have to compensate for other variables as mentioned earlier which includes a very important psychoacoustic effect (see Fletcher Munson equal loudness curves).. In short, a flat response will not sound so great to most people...
Tip: The broad bass and treble settings are adjusted last after corrections / changes are made to the curve using the 7 individual EQ frequency settings...
----------------------------------------------------
6 - Here are my final EQ settings after taking all variables (environment, hearing, psychoacoustic effects, and preferences) into account...
And here are my current audio settings*:
- ASD / Active Sound Design (off)
- Surround (off)
- Speed Volume (0)
- Balance: (0)
- Fade: (front +2)
- Broad Bass (+2)
- Broad Treble (-2)
*Note that these are my new settings after I did some some much needed improvements to current OE Subwoofer system...
How to Improve OE Subwoofer Quality and Eliminate Vibrations
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