Log in
Register
Home
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
News
Members
Current visitors
New profile posts
Search profile posts
Features
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Menu
Install the app
Install
Reply to thread
Home
Forums
Pro Audio
Varsity
FIR filters
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Frank Koenig" data-source="post: 147935" data-attributes="member: 416"><p>Re: FIR filters</p><p></p><p></p><p>I see a double sided time response like this:</p><p></p><p>[ATTACH]154505[/ATTACH]</p><p></p><p>If I feed it an impulse it makes a nice symmetrical arrowhead. But I better go back and take a careful look at my code to see what it's really doing.</p><p></p><p>The purpose of the initial window is just decisively to chop off the acoustic reflections to ensure an anechoic measurement. As in 2 times a 13 ft high tower minus 10 ft from speaker to mic = 16 ft. or 14 ms. But I think you're right in that any reflection should show up at its time in the TFE representation and the initial window is unnecessary. I should take a measurement holding a road case cover a few feet from the central axis and see what it looks like. I'll try turning off the initial window on the data I have and see if I can see the ground bounce out at ~15 ms.</p><p></p><p>--Frank</p></blockquote><p></p>
[QUOTE="Frank Koenig, post: 147935, member: 416"] Re: FIR filters I see a double sided time response like this: [ATTACH=CONFIG]154505.vB5-legacyid=14051[/ATTACH] If I feed it an impulse it makes a nice symmetrical arrowhead. But I better go back and take a careful look at my code to see what it's really doing. The purpose of the initial window is just decisively to chop off the acoustic reflections to ensure an anechoic measurement. As in 2 times a 13 ft high tower minus 10 ft from speaker to mic = 16 ft. or 14 ms. But I think you're right in that any reflection should show up at its time in the TFE representation and the initial window is unnecessary. I should take a measurement holding a road case cover a few feet from the central axis and see what it looks like. I'll try turning off the initial window on the data I have and see if I can see the ground bounce out at ~15 ms. --Frank [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Varsity
FIR filters
Top
Bottom
Sign-up
or
log in
to join the discussion today!