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
Spectralayers signal observed at 60, 180, 300 and up.
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="Art Welter" data-source="post: 216399" data-attributes="member: 52"><p>Hi Kirmeth,</p><p></p><p>Not sure exactly what your question is, or what display you are looking at. </p><p>The low "B" on a five string bass is 31Hz, it's harmonics are at multiples of that frequency.</p><p> </p><p>Many guitar amps and speakers are actually designed to progressively add more harmonic distortion with increased volume level, so if you were to put in a 30Hz signal, looking at the response on a RTA (real time analyzer) the fundamental (30Hz) and multiples of the frequency would be visible, 30x2=60 (second harmonic), 30x3=120(third harmonic) 30x4=180 (fourth harmonic) etc. </p><p>The levels of harmonic distortion added at high levels in guitar amps often exceed the fundamental, THD can be well above 100%.</p><p>This makes the amp sound louder than it actually is in SPL (sound pressure level).</p><p></p><p>A "clean" subwoofer would not exceed 10% THD (harmonics would be more than 20dB lower in SPL than the fundamental frequency) if operated within it's linear range, driver excursion not exceeding Xmax.</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 216399, member: 52"] Hi Kirmeth, Not sure exactly what your question is, or what display you are looking at. The low "B" on a five string bass is 31Hz, it's harmonics are at multiples of that frequency. Many guitar amps and speakers are actually designed to progressively add more harmonic distortion with increased volume level, so if you were to put in a 30Hz signal, looking at the response on a RTA (real time analyzer) the fundamental (30Hz) and multiples of the frequency would be visible, 30x2=60 (second harmonic), 30x3=120(third harmonic) 30x4=180 (fourth harmonic) etc. The levels of harmonic distortion added at high levels in guitar amps often exceed the fundamental, THD can be well above 100%. This makes the amp sound louder than it actually is in SPL (sound pressure level). A "clean" subwoofer would not exceed 10% THD (harmonics would be more than 20dB lower in SPL than the fundamental frequency) if operated within it's linear range, driver excursion not exceeding Xmax. Art [/QUOTE]
Insert quotes…
Verification
Post reply
Home
Forums
Pro Audio
Varsity
Spectralayers signal observed at 60, 180, 300 and up.
Top
Bottom
Sign-up
or
log in
to join the discussion today!