Low Frequency Definition? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 14 Old 03-10-2012, 10:51 AM - Thread Starter
Member
 
mikesorensen06's Avatar
 
Join Date: Dec 2011
Location: Arizona
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
What is the frequency range, from lowest to highest for the phrase "low frequency"?

Cheers,
Mike
mikesorensen06 is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old 03-10-2012, 12:06 PM
AVS Special Member
 
Bigus's Avatar
 
Join Date: Feb 2003
Location: The South
Posts: 4,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 50
19.7 Hz to 63.39 Hz.

Bigus is offline  
post #3 of 14 Old 03-10-2012, 05:09 PM
Advanced Member
 
fastl's Avatar
 
Join Date: Sep 2007
Location: Boston
Posts: 584
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 11
I don't think there is any exact frequency range that falls into the "low frequency" category, since that is descriptive terminology. Are you trying to define this frequency range for any particular purpose?
fastl is offline  
post #4 of 14 Old 03-10-2012, 05:47 PM
AVS Special Member
 
Glimmie's Avatar
 
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 7,955
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 153 Post(s)
Liked: 216
Depends who you ask.

I say it is anything below 1ghz

Glimmie's HT Page
Being redone - comming soon!

Glimmie is online now  
post #5 of 14 Old 03-10-2012, 06:12 PM
AVS Special Member
 
rovingtravler's Avatar
 
Join Date: Nov 2010
Location: Clovis, NM
Posts: 1,262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 14
Quote:
Originally Posted by Glimmie View Post

Depends who you ask.

I say it is anything below 1ghz

lol

true and there is no low end maybe a top of low but the military uses ultra low freq radio for underwater radio transmission.

David

"You buy a Ferrari when you want to be somebody. You buy a Lamborghini when you are somebody." - Frank Sinatra
rovingtravler is offline  
post #6 of 14 Old 03-10-2012, 09:39 PM
AVS Special Member
 
Bigus's Avatar
 
Join Date: Feb 2003
Location: The South
Posts: 4,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 50
Quote:
Originally Posted by fastl View Post

I don't think there is any exact frequency range that falls into the "low frequency" category

Not true, I gave the range above. It is valid for any definition of low frequency for any use, anywhere, at all times.

Bigus is offline  
post #7 of 14 Old 03-10-2012, 11:24 PM
Advanced Member
 
bigbrother52's Avatar
 
Join Date: Nov 2006
Location: Hudson River Valley, N.Y.
Posts: 943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 16
Quote:
Originally Posted by Bigus View Post

Not true, I gave the range above. It is valid for any definition of low frequency for any use, anywhere, at all times.

That is a pretty bold and broad statement!
Although I have seen that definition before, "for any use, anywhere, at all times" cannot apply.

For instance, many will define the range of "audible" sound as differentiated into 3 main categories.
1. Subsonic or "low frequency" sound being in the range of 20Hz to about 500Hz.
2. Midrange frequencies are said to inhabit the realm of 500Hz to 6KHz (6000Hz)with
3. high frequency sound being in the 6KHz to 20KHz range.

Then again, if you were talking "radio" freq., the definition would be
ELF Extremely Low Frequency 3 - 30 Hz
SLF Super Low Frequency 30 - 300 Hz
ULF Ultra Low Frequency 300 - 3000 Hz and
VLF Very Low Frequency 3 - 30 kHz

There are other examples as well.
So it really depends on how the term low freq. is being used, and often, who it is that defines it.
Saying "for any use, anywhere, at all times" simply does not work.

TURN IT UP!
bigbrother52 is offline  
post #8 of 14 Old 03-11-2012, 09:46 AM
AVS Special Member
 
Bigus's Avatar
 
Join Date: Feb 2003
Location: The South
Posts: 4,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 50
Erm, I thought the sarcasm was obvious. The question isn't even answerable. First, it isn't made clear whether we are talking about sound or photons, and then we don't know the application in mind, from navy sonar to CT scanners.

But if we assume that the question was directed at home audio, then we can quickly agree it still isn't answerable as there is no standard definition.


BTW, subsonic does by definition mean that which is below our limit of hearing, thus even your attempt at a definition might need to be adjusted a bit.

Bigus is offline  
post #9 of 14 Old 03-11-2012, 10:50 AM
Advanced Member
 
bigbrother52's Avatar
 
Join Date: Nov 2006
Location: Hudson River Valley, N.Y.
Posts: 943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 16
Quote:
Originally Posted by Bigus View Post

Erm, I thought the sarcasm was obvious. The question isn't even answerable. First, it isn't made clear whether we are talking about sound or photons, and then we don't know the application in mind, from navy sonar to CT scanners.

But if we assume that the question was directed at home audio, then we can quickly agree it still isn't answerable as there is no standard definition.


BTW, subsonic does by definition mean that which is below our limit of hearing, thus even your attempt at a definition might need to be adjusted a bit.

Sorry, your posts seemed so emphatic that the sarcasm was not obvious to me at all

My own posted definition was not meant to be "thee" definitive answer to the question, it just seemed like something reasonable to say because I just could not read your statement and let it stand unchallenged, even if it was the middle of the night!

How can you even tackle a word like subsonic when most subwoofers on the market barely go down to 20hz?
I suppose we can all agree that descriptive words in audio are for the most part disam-Bigus at best.

TURN IT UP!
bigbrother52 is offline  
post #10 of 14 Old 03-11-2012, 02:23 PM
AVS Addicted Member
 
noah katz's Avatar
 
Join Date: Apr 1999
Location: Mountain View, CA USA
Posts: 20,514
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 203 Post(s)
Liked: 155
Quote:
Originally Posted by Bigus View Post

BTW, subsonic does by definition mean that which is below our limit of hearing, thus even your attempt at a definition might need to be adjusted a bit.

Actually subsonic is less than the speed of sound; I believe infrasonic is the correct term.

Noah
noah katz is online now  
post #11 of 14 Old 03-11-2012, 03:08 PM
AVS Special Member
 
Bigus's Avatar
 
Join Date: Feb 2003
Location: The South
Posts: 4,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 50
Quote:
Originally Posted by noah katz View Post


Actually subsonic is less than the speed of sound; I believe infrasonic is the correct term.

Doh! The foot is nearing...

Bigus is offline  
post #12 of 14 Old 03-11-2012, 05:08 PM
Advanced Member
 
fastl's Avatar
 
Join Date: Sep 2007
Location: Boston
Posts: 584
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked: 11
The OP doesn't seem to be responding, so it's anyone guess as to why he asked the question? The latest research into the psychoacoustics of low frequency sound perception indicates that the 1st critical band actually runs all the way from 20 Hz up to 100 Hz, so I guess you could say that anything below 100 Hz could be considered as "low frequency".
fastl is offline  
post #13 of 14 Old 03-11-2012, 10:23 PM
Advanced Member
 
bigbrother52's Avatar
 
Join Date: Nov 2006
Location: Hudson River Valley, N.Y.
Posts: 943
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 16
Quote:
Originally Posted by fastl View Post

The OP doesn't seem to be responding, so it's anyone guess as to why he asked the question?

I now recall reading a short thread he started a couple of months back about quadratic diffusion in our rooms.
One would hope that the guy who started that thread should already have a pretty good handle on what range could be considered low frequency.

TURN IT UP!
bigbrother52 is offline  
post #14 of 14 Old 03-11-2012, 10:50 PM
AVS Special Member
 
gamelover360's Avatar
 
Join Date: Jun 2005
Location: Orebro, Sweden!!!
Posts: 2,775
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by mikesorensen06 View Post

What is the frequency range, from lowest to highest for the phrase "low frequency"?

Cheers,
Mike

You may also think of 20hz-80hz as low frequency as well in a very practical sense, as that is the general frequency range that most people have their subwoofer operating.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
gamelover360 is offline  
Reply Ultra Hi-End HT Gear ($20,000+)

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off