Long story short, I'm considering doing spinorama-type graph in my speaker measurements in addition to the graphs at various angles and listening window I currently do. Early reflections are a simple average, but I'm confused as to how to go about calculating the power response.
According to CTA 2034-A, which defines the spinorama:
"The sound power is the weighted rms average of all 70 measurements, with individual measurements weighted according to the portion of the spherical surface that they represent. Calculation of the sound power curve begins with a conversion from SPL to pressure, a scalar magnitude. The individual measures of sound pressure are then weighted according to the values shown in Appendix C and an energy average (rms) is calculated using the weighted values. The final average is converted to SPL. "
(CTA-2034A is a free document by the way, and a good resource should you ever want to make your own speaker measurements)
I'm lost at converting the SPL graphs to scalar magnitudes and how to perform weighted averages on graph data. Is there any present software that can do so? Plus I'd have to consider moving to 10-degree increments instead of 15, but that's another discussion.
If anyone can lead the way - or otherwise provide a useful way to generate a sound power curve, I'm all ears.
According to CTA 2034-A, which defines the spinorama:
"The sound power is the weighted rms average of all 70 measurements, with individual measurements weighted according to the portion of the spherical surface that they represent. Calculation of the sound power curve begins with a conversion from SPL to pressure, a scalar magnitude. The individual measures of sound pressure are then weighted according to the values shown in Appendix C and an energy average (rms) is calculated using the weighted values. The final average is converted to SPL. "
(CTA-2034A is a free document by the way, and a good resource should you ever want to make your own speaker measurements)
I'm lost at converting the SPL graphs to scalar magnitudes and how to perform weighted averages on graph data. Is there any present software that can do so? Plus I'd have to consider moving to 10-degree increments instead of 15, but that's another discussion.
If anyone can lead the way - or otherwise provide a useful way to generate a sound power curve, I'm all ears.