How to Reduce Microphone Noise During Android Calls

Identify the symptom and environment

Start by describing what the other person actually hears. If they report constant hiss, rumble, traffic, keyboard clicks, or a voice that sounds distant or muffled, note whether the problem occurs in the phone app, a video call app, a recording app, or all of them. Also record when it happens: on speakerphone, with a wired headset, with Bluetooth earbuds, or while holding the phone normally.

The environment matters as much as the phone. A fan, air conditioner, open window, or hard-walled room can create background noise that the microphone picks up. Check whether the noise is still present outdoors or in a quiet room. This helps separate a device or app issue from ordinary room sound.

Isolate where the fault occurs

Test the same microphone in more than one app. Make a short voice recording and then join a call in another app. If only one app sounds noisy, the problem is likely in that app's noise suppression setting or in how it selects the input device. If the noise is present in every app, continue testing the hardware and system settings.

Change the output device to help separate causes. If the complaint disappears when you switch from speakerphone to the earpiece, the call may be using a different microphone or picking up sound from the speaker. With a Bluetooth headset, check whether the headset microphone is being used instead of the phone microphone. Some Bluetooth devices also have their own input level controls.

Temporary app permissions can also affect audio behavior. Confirm that the calling or recording app still has microphone permission. If a second app is listening to the microphone at the same time, close it and test again.

Try reversible fixes in order

Begin with the lowest-risk changes. Remove a thick or non-original case that may cover the phone's microphone openings. Wipe the small holes near the bottom, top, or rear camera with a dry, soft brush or cloth. Do not insert pins or liquids into the openings.

Hold the phone so your hand does not cover the microphone holes. In many calling apps, keeping the phone too close to your face can also make breath sounds more noticeable. Move the phone slightly away and speak at a normal volume.

Reduce the room noise before changing software. Move away from fans, close a window, or move to a carpeted or furnished room. If the noise is mainly low-level background sound, this may be enough.

Check the calling app for a microphone or audio settings area. The exact labels vary by app and version, but common options include noise suppression, voice isolation, or microphone mode. If available, turn on noise suppression or select a voice-focused mode rather than a music or general mode. If the option is already enabled, switch it off briefly and compare.

Try a different input device if you have one. A wired headset or USB microphone can show whether the phone's built-in microphones are the source of the problem. On Android, the system does not share one universal audio settings path across all brands, so begin with the app's own audio settings before looking in the phone's sound or call settings.

Confirm the result

Make a short test call in the same room and conditions where the problem was first noticed. Ask the other person whether the background noise is lower and whether your voice is clear. Repeat the test in a second app if the issue appeared in more than one. The fix is confirmed only when the original symptom is gone or clearly reduced without making your voice harder to understand.

If the problem remains

Keep notes on which app, input device, and location were tested. If one Bluetooth or wired accessory removes the noise, the built-in phone microphone or its protective openings may need attention. If the noise appears only in one app, check that app's support guidance for known audio issues on your Android version.

Do not treat a noisy call as automatic proof of failed hardware. A damaged case, blocked microphone opening, app setting, or very noisy room can all produce the same symptom. If cleaning, switching inputs, and app settings do not help, contact the phone manufacturer or a qualified repair service and describe the tests you already performed.