From 21dda3254cc909a283c2a30844485ea40546587d Mon Sep 17 00:00:00 2001
From: Andrew Heather <>
Date: Tue, 23 Mar 2021 17:12:14 +0000
Subject: [PATCH] BUG: noiseModel - respect lower frequency bound in octave
 calculation. Fixes #2041

---
 src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C
index efc36e3346..c197d95f6d 100644
--- a/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C
+++ b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C
@@ -81,6 +81,10 @@ void Foam::noiseModel::setOctaveBands
 
     // Convert to lower band limit
     fTest /= fRatioL2C;
+    while (fTest < fLower)
+    {
+        fTest *= fRatio;
+    }
 
     forAll(f, i)
     {