diff --git a/html/saraR4.html b/html/saraR4.html
index ea8b29d..119e190 100755
--- a/html/saraR4.html
+++ b/html/saraR4.html
@@ -1972,11 +1972,11 @@ async function selfTestSequence() {
           }
 
         } else if (sensor.type === 'noise') {
-          // Noise sensor test
+          // NSRT MK4 noise sensor test (returns JSON)
           const noiseResult = await new Promise((resolve, reject) => {
             $.ajax({
               url: 'launcher.php?type=noise',
-              dataType: 'text',
+              dataType: 'json',
               method: 'GET',
               timeout: 15000,
               success: function(data) { resolve(data); },
@@ -1984,18 +1984,17 @@ async function selfTestSequence() {
             });
           });
 
-          selfTestReport.rawResponses['Noise Sensor'] = noiseResult;
-          addSelfTestLog(`Noise response: ${noiseResult.trim()}`);
+          selfTestReport.rawResponses['Noise Sensor'] = JSON.stringify(noiseResult);
+          addSelfTestLog(`Noise response: ${JSON.stringify(noiseResult)}`);
 
-          const noiseValue = parseFloat(noiseResult.trim());
-          if (!isNaN(noiseValue) && noiseValue > 0) {
-            updateTestStatus(sensor.id, 'Passed', `${noiseValue} dB`, 'bg-success');
-            testsPassed++;
-          } else if (noiseResult.trim() !== '') {
-            updateTestStatus(sensor.id, 'Warning', `Unexpected value: ${noiseResult.trim()}`, 'bg-warning');
+          if (noiseResult.error) {
+            updateTestStatus(sensor.id, 'Failed', noiseResult.error, 'bg-danger');
             testsFailed++;
+          } else if (noiseResult.LEQ > 0 && noiseResult.dBA > 0) {
+            updateTestStatus(sensor.id, 'Passed', `LEQ: ${noiseResult.LEQ} dB | dB(A): ${noiseResult.dBA}`, 'bg-success');
+            testsPassed++;
           } else {
-            updateTestStatus(sensor.id, 'Failed', 'No data received', 'bg-danger');
+            updateTestStatus(sensor.id, 'Warning', `Unexpected values: LEQ=${noiseResult.LEQ}, dBA=${noiseResult.dBA}`, 'bg-warning');
             testsFailed++;
           }