AFMG Network Forum
AFMG Network Forum Index -> EASE 4 -> From wav to Pascal (Pa) and dB in probe.
Post new topic  Reply to topic View previous topic :: View next topic 
From wav to Pascal (Pa) and dB in probe.
PostPosted: Thu Aug 11, 2022 11:26 pm Reply with quote
StoneBored
Member
 
Joined: 25 Jun 2022
Posts: 1
Location: Malta - Chile




Hi everyone! Hope you're doing good.
I am trying to process the data from an Aura wav audio of my model.
How can I reroduce the Aura values using the wav data?

I'm going to try to explain myself..

To read the audio I use dirac, which gives me the Impulse response amplitude in % from 0% to 100% and the ETC 0 dBfs has maximum amplitude. I tried to do it in python/matlab as well and the reading values are from -32767 to 32767, I understand this values came from the Bit Depth which are actually 2^16 for a a Bit Depth of 16 bits.

How Aura calculate the wav amplitude values in Pa?
How Aura convert the Pa values to dB in the ETC curve?

Furthermore, the Pa values are in mPa (mili pascal).
Find attached in the link the Figures which shows the IR graph and ETC graph in Probe.

https://drive.google.com/drive/folders/1uKj0US70HjDDSY0_xsMfOms_ZQ0yLRn6?usp=sharing

Thanks!
View user's profile Send private message
PostPosted: Mon Aug 15, 2022 2:17 pm Reply with quote
AFMG Frank Siegmann
Member
 
Joined: 18 Jul 2005
Posts: 236




I'm not quite sure what your intention is. If you would like to see the by AURA calculated values in Pa you could save the data as .bir file.
Then you could open these files in EASERA
https://www.afmg.eu/en/afmg-easera/url
and you will see the values in Pa.
View user's profile Send private message
Re: From wav to Pascal (Pa) and dB in probe.
PostPosted: Thu Dec 29, 2022 10:10 am Reply with quote
jasonn
Member
 
Joined: 29 Dec 2022
Posts: 3




StoneBored wrote:
Hi everyone! Hope you're doing good.
I am trying to process the data from an Aura wav audio of my model.
How can I reroduce the Aura values using the wav data?

I'm going to try to explain myself..

To read the audio I use dirac, which gives me the Impulse response amplitude in % from 0% to 100% and the ETC 0 dBfs has maximum amplitude. I tried to do it in python/matlab as well and the reading values are from -32767 to 32767, I understand this values came from the Bit Depth which are actually 2^16 for a a Bit Depth of 16 bits.

How Aura calculate the wav amplitude values in Pa?
How Aura convert the Pa values to dB in the ETC curve?

Furthermore, the Pa values are in mPa (mili pascal).
Find attached in the link the Figures which shows the IR graph and ETC graph in Probe.

https://drive.google.com/drive/folders/1uKj0US70HjDDSY0_xsMfOms_ZQ0yLRn6?usp=sharing

Thanks!

To reproduce the Aura values from the WAV data, you will need to convert the WAV data into the relevant units (Pa). The process for doing this depends on the specific WAV file format you are dealing with, but in general, you will need to convert the 16-bit digital sample values into a physical unit such as Pa. You can then use the ETC curve to calculate the dB level from the Pa values.
View user's profile Send private message
PostPosted: Fri Jan 13, 2023 4:12 pm Reply with quote
Bruce
Member
 
Joined: 19 Apr 2005
Posts: 459
Location: Minneapolis, MN, USA




When the BIR files are created using AURA, by default they are normalized to 100dB. If you instead create RSP files from AURA, you can then use EARS to convert them to BIR files that have relative values in dB instead. These can then be converted to WAV files for use in other software, but they then lose the binaural information and are saved as though they were monaural.

As Frank said, the BIR files themselves can be read by EASERA.

_________________
Best Regards,
Bruce C. Olson
View user's profile Send private message Send e-mail Visit poster's website
AFMG Network Forum Index -> EASE 4
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
All times are GMT  
Page 1 of 1  

  
  
 Post new topic  Reply to topic  


Powered by phpBB © 2001-2003 phpBB Group
Theme created by Vjacheslav Trushkin
Variation by CodeWeavers and AFMG