algorithmic modeling for Rhino
I made a research classroom model on the change of T30 and SPL by the effects of ENVIRONMENT FACTOR in Pachyderm-rhino. But after the changes I did not notice a clear difference from T30 and SPL. According to previous research by L. Gomez-Agustina et.al. there is a change.
Can anyone who has done research on this help me?
I'm not sure I understand, but are you asking about the effects of changing Air Temperature and Humidity?
I ran Source 0 at 1 C and 80 C and got different results (SPL attached). These are less than 1dB; were you expecting more?
Yes, this makes sense. For a first order reflection, the distance traveled is about 4.25 m. the speed of sound at 1C is ~ 332 m/s and 80C it is ~377 m/s. Keep in mind that dB is a logarithmic scale and reverb time is linear.
Glad to help!
I recommend the default for environmental settings; this is what most calculations and standards in acoustics assume unless stated otherwise.
My experience is more on the acoustic side than with Pachyderm. However, I believe Minimum Convergence is faster, while Detailed is more accurate. Given the length of calculation time, I'd use Minimum.
You might find this video https://vimeo.com/247018860 on how to adjust the parameters of the Pachyderm simulation helpful. About your first question, at school I learned that the atmospheric atenuation plays a great role in Volumes greater than 10000 m3. Your volume is 6,5 x 3,3 x4,2 = 90,09 m3, thus atmospheric attenuation should not play an important role.
The atmospheric attenuation of sound according to ISO 9613-1 amounts to 0,0019dB at 1m from the source. It changes linearly (0,19 dB attenuation at 100m).