Welcome Guest ( Log In | Register )

Reply to this topicStart new topic
post Jul 7 2004, 18:57
Post #1

Group: Members
Posts: 10
Joined: 16-June 04
Member No.: 14720

I have been recording sounds in Matlab and ploting them to see the shape of the envelope. I understand that the signal is displayed over time and has a general amplitude(from 1 to -1).
My question is how can I convert this general amplitude into something useful like values in dB or voltage. Does anyone know?

Go to the top of the page
+Quote Post
post Jul 8 2004, 23:48
Post #2


Group: Super Moderator
Posts: 3936
Joined: 29-September 01
Member No.: 73

L being the level displayed, the formula for the voltage is trivial :

V = Vmax x L

In db, it is

20 x log10 (L)

I never used mathlab, so I can't help you to use these formulae.
Go to the top of the page
+Quote Post
post Jul 9 2004, 10:40
Post #3

Group: Members
Posts: 2
Joined: 3-July 04
Member No.: 15043


try that in matlabcode.
Go to the top of the page
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:


RSS Lo-Fi Version Time is now: 1st December 2015 - 01:30