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Re: Measuring acoustic noise of MRI scanner

Hi Fatima,

If you just want the sound level, then I don't see why you would want to get any
fancier than the MRI-compatible meter you found.

However, I think it would be worth the trouble to be able to analyze the noise
produced by your gradient pulse in more detail at some point, depending on the
type of experiment you are planning.

Here is a link to a more detailed analysis done using microphones in the
scanner, including the effects of different EPI parameters and references to
other relevant work:


Brandon Abbs, PhD
Postdoctoral Research Fellow
Brigham and Women's Hospital
Harvard Medical School
-----Original Message-----
From: AUDITORY - Research in Auditory Perception
[mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Fatima Husain
Sent: Tuesday, December 28, 2010 10:30 PM
To: AUDITORY@xxxxxxxxxxxxxxx
Subject: [AUDITORY] Measuring acoustic noise of MRI scanner

I am trying to set up a relatively easy method to measure acoustic noise within
MRI scanners, as close to the bore as possible.
I have come up with two scenarios, wondering if anyone has any experience with

1] measure noise using an MRI-compatible sound level meter, such as

2] use a calibrated microphone, extension cable threaded through a wave guide
and an external integrating sound level meter, such as instruments from Casella
Cel (casellausa.com)

Thanks in advance!


Fatima Husain, Ph.D.
Auditory Cognitive Neuroscience Lab
Assistant Professor, Speech and Hearing Science and the Beckman Institute
University of Illinois

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