Replies: 1 comment
-
Hello, The impedance tube method greatly affects small imperfections in the tube or positions. I don't know exactly what could be happening, the possible problems could be:
I have reviewed the measurements that you have sent me to the email, you can see in the impulse response that there is a lot of noise, it is quite likely that the system is not receiving the signal correctly. You have to check the input and output channels, confirm that the signal is received and also that it is received without clipping. Your impulse response:Usual impulse response (It does not have the latency correction applied, it does not matter, what you should compare are the waveforms): |
Beta Was this translation helpful? Give feedback.
0 replies
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Uh oh!
There was an error while loading. Please reload this page.
-
Originally posted by @mwp4444 in #1 (comment)
I am a Ph.D. student in mechanical engineering. We are going to measure noise reduction based on aerogel developed by us during nanocomposite material research. I feel a lot of gratitude for A-Lab. Thanks to this, it seems that noise reduction research can be conducted. I have an inquiry during the measurement.
Based on the impedance tube, sound absorption was measured, and the measured value was negative. The sample file you attached also has a negative number.
It is known that a value between 0 and 1 should be obtained for the sound options coefficient value. (Refer to the paper)
Matlab determines that modification is necessary mathematically, and I am also looking at the code from the beginning.
Please tell me if I'm going in the wrong direction.
Measurement_of_the_Acoustic_Absorption_Coefficient.pdf
Beta Was this translation helpful? Give feedback.
All reactions