Why it happens
Microphone capturing speaker output and feeding it back to callers, caused by insufficient acoustic separation between the speakers and the built-in microphone array
Realtek audio driver microphone boost set too high, amplifying ambient sound and speaker feedback into the microphone signal
Listen to this device enabled in microphone properties, routing the microphone input directly to the speakers and creating a feedback loop
Echo cancellation disabled in the Realtek driver or communication app, allowing raw microphone audio to pass to callers without processing
How to fix
Disable Listen to this device — Go to Control Panel → Sound → Recording, right-click the Microphone Array → Properties → Listen tab. Uncheck Listen to this device. This is the most common cause of echo heard by the Inspiron 16 5640 user themselves during calls.
Enable echo cancellation in the Realtek driver — Open Realtek Audio Console from the Start menu. Under Microphone → Effects, enable Acoustic Echo Cancellation (AEC) and Noise Suppression. AEC actively removes speaker sound from the microphone signal, which eliminates echo heard by callers on the Inspiron 16 5640.
Reduce microphone boost to 0 dB — Right-click the speaker icon → Sound settings → More sound settings → Recording tab → Microphone Array → Properties → Levels tab. Set Microphone Boost to 0 dB. A high boost level amplifies ambient sounds and speaker leakage into the microphone, worsening echo for callers.
Enable echo cancellation in the calling app — In Teams, go to Settings → Devices → Noise suppression and set to High. In Zoom, Settings → Audio → Suppress background noise: Auto. Each calling app applies its own echo cancellation layer on top of the Windows Realtek AEC, and enabling both provides the best echo suppression on the Inspiron 16 5640.
Use a headset instead of the built-in microphone — A wired or Bluetooth headset with a close-positioned microphone eliminates speaker-to-microphone leakage entirely. The headset microphone is far from the speakers and the headphone cups prevent speaker sound from reaching the mic, which is the most reliable way to eliminate echo on the Inspiron 16 5640 in loud environments.
Zulkifli, Kuching: “People on calls kept hearing an echo on my Inspiron 16 5640. Enabling Acoustic Echo Cancellation in Realtek Audio Console and reducing microphone boost to 0 dB completely eliminated the echo issue.”
Frequently Asked Questions
What microphone does the Dell Inspiron 16 5640 have?
The Dell Inspiron 16 5640 has a dual-array microphone (stereo mics) positioned at the top of the display bezel. The Realtek audio driver provides software processing including noise suppression and echo cancellation through the Realtek Audio Console application.
Why do callers hear my echo but I cannot hear it myself?
The echo callers hear is the delayed return of their own voice, which your Inspiron 16 5640 microphone picks up from your speakers and sends back to them. You do not hear this echo because it is your speakers playing the caller voice — your own voice echoes only in their headset. Enabling AEC on your device fixes this.
Does Dell SupportAssist help diagnose microphone echo on the Inspiron 16 5640?
Dell SupportAssist can test the microphone hardware to confirm it is functioning. However, echo is a software and configuration issue, not a hardware defect. Dell SupportAssist hardware tests pass even when echo is present. Configure the Realtek Audio Console settings as described above rather than relying on SupportAssist diagnostics for echo issues.
Can Windows built-in settings fix echo on the Inspiron 16 5640 without Realtek Audio Console?
Partially. Windows audio enhancements under Sound → Recording → Microphone Properties → Enhancements include noise suppression and echo cancellation options for compatible drivers. Enable these in the Enhancements tab if Realtek Audio Console is not installed. The Realtek Audio Console provides more granular control than the basic Windows enhancement interface.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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