diff --git a/Conjuga/Conjuga/Services/PronunciationService.swift b/Conjuga/Conjuga/Services/PronunciationService.swift
index 0177bb9..fee2995 100644
--- a/Conjuga/Conjuga/Services/PronunciationService.swift
+++ b/Conjuga/Conjuga/Services/PronunciationService.swift
@@ -86,6 +86,7 @@ final class PronunciationService {
             }
 
             inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { buffer, _ in
+                guard buffer.frameLength > 0 else { return }
                 request.append(buffer)
             }