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<div dir="ltr">Hi Joe,</div>
<div dir="ltr">Our fab is also bay and chase with a 24” raised floor.</div>
<div dir="ltr">Our litho bay is 65-69dB(A) with the Niosh iPhone app.</div>
<div dir="ltr">Our DRIE bay is 71-76, more typical bays are 67-74, worse near wet benches with large exhaust flows.</div>
<div dir="ltr">In the chase with the big dry pumps, it can get up to 80.</div>
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<div dir="ltr">Best regards,</div>
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<div dir="ltr">Jim</div>
<div dir="ltr">NIST Boulder BMF </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Joseph Losby <joseph.losby@ucalgary.ca><br>
<b>Sent:</b> Tuesday, March 18, 2025 3:21:16 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] Cleanroom dB levels</font>
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Hi everyone,</div>
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Have any of you taken acoustic noise measurements of your cleanroom facilities, or have a basis of design for acceptable levels? </div>
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If you can share your facility ACH with noise level ( dB ) that would be great. Any other input will be much appreciated as well. </div>
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Cheers,</div>
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Joe</div>
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<p style="text-align:left; margin:0px"><span style="font-family:Calibri,Calibri_EmbeddedFont,Calibri_MSFontService,sans-serif; font-size:10pt; color:rgb(214,0,28); line-height:17px"><b>Joseph Losby, PhD</b></span></p>
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