Discussion:
Octomic Impulses Up North
(too old to reply)
Jonathan Kawchuk
2018-09-16 18:18:54 UTC
Permalink
Hi all,

I'm gathering some impulses in at-risk environments in western Canada and
I'm looking for someone to rent an Octomic from. I thought I'd see if
anyone in the community is interested or has any leads. Getting 2nd order
resolution is pretty important for this particular use case.

I'm also curious if anyone has experimented with running an inverse EQ
calibration curve for your your sweep speakers in order to compensate for
inherent peaks and valleys in the speaker’s frequency response during
impulse response capture. Not sure if this is needed or if a sweep
generally irons out these inconsistencies?

Thanks a ton!

Jon

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Fons Adriaensen
2018-09-22 16:07:31 UTC
Permalink
Post by Jonathan Kawchuk
I'm also curious if anyone has experimented with running an inverse EQ
calibration curve for your your sweep speakers in order to compensate for
inherent peaks and valleys in the speaker’s frequency response during
impulse response capture. Not sure if this is needed or if a sweep
generally irons out these inconsistencies?
The way this is usually done is to record a sweep using an omni
measurement mic, compute the inverse EQ from that and apply it
to the measured IRs, not to the speaker signal (the net effect
is the same).
--
FA
Aaron Heller
2018-09-22 21:19:18 UTC
Permalink
The is known as the "substitution method" in microphone calibration
literature.
Post by Fons Adriaensen
Post by Jonathan Kawchuk
I'm also curious if anyone has experimented with running an inverse EQ
calibration curve for your your sweep speakers in order to compensate for
inherent peaks and valleys in the speaker’s frequency response during
impulse response capture. Not sure if this is needed or if a sweep
generally irons out these inconsistencies?
The way this is usually done is to record a sweep using an omni
measurement mic, compute the inverse EQ from that and apply it
to the measured IRs, not to the speaker signal (the net effect
is the same).
--
FA
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Jonathan Kawchuk
2018-09-22 21:43:10 UTC
Permalink
Thanks! Thats really good to know (and much less of a commitment).
Post by Aaron Heller
The is known as the "substitution method" in microphone calibration
literature.
Post by Fons Adriaensen
Post by Jonathan Kawchuk
I'm also curious if anyone has experimented with running an inverse EQ
calibration curve for your your sweep speakers in order to compensate for
inherent peaks and valleys in the speaker’s frequency response during
impulse response capture. Not sure if this is needed or if a sweep
generally irons out these inconsistencies?
The way this is usually done is to record a sweep using an omni
measurement mic, compute the inverse EQ from that and apply it
to the measured IRs, not to the speaker signal (the net effect
is the same).
--
FA
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Sursound mailing list
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
edit account or options, view archives and so on.
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Len Moskowitz
2018-09-23 16:10:03 UTC
Permalink
Post by Jonathan Kawchuk
I'm gathering some impulses in at-risk environments in western Canada
and
I'm looking for someone to rent an Octomic from. I thought I'd see if
anyone in the community is interested or has any leads. Getting 2nd
order
resolution is pretty important for this particular use case.
Audio Rents in LA has one for rent:
https://audiorents.com/rental/2/activity/Field-Recording.html




Len Moskowitz (***@core-sound.com)
Core Sound LLC
www.core-sound.com
Home of OctoMic and TetraMic

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