The built-in microphone on a 70Mai dash cam adds sound context to recorded video. It is intended for practical cabin and road audio rather than high-fidelity recording.
- Voices from the driver and passengers may be recorded.
- Horns, sirens, shouting, and other loud events may be captured.
- Traffic, motorcycles, rain, and other outside sounds can enter through the windows.
- Engine, road, trim, and mounting vibration may appear as background noise.
- Open windows can create strong wind and pressure noise.
Audio Recording Controls
Audio may be controlled through the 70Mai app, directly on a dash cam with suitable on-device controls, or through another supported control method depending on the model.
[compare] 70Mai app | Common control path for models that expose recording settings through the dash cam Wi-Fi connection Dash cam menu | Available on some models with a screen or suitable physical controls [/compare]Using the 70Mai App
[step] 1. Power on the dash cam and allow normal recording to begin. 2. Open the 70Mai app. 3. Connect to the dash cam through its Wi-Fi hotspot when required. 4. Open the device settings. 5. Look for Audio Recording, Record Sound, Microphone, or similar wording. 6. Turn audio recording on or off. 7. Confirm or save the setting if prompted. [/step] [note] The change may take effect immediately on some models or from a new recording clip on others. A clip already being recorded may retain its previous audio state until the next segment begins. [/note]Using the Dash Cam Menu
If the dash cam has a screen or accessible device settings, the microphone control may also be available directly on the camera.
- Open the camera settings or system menu.
- Look for Audio, Microphone, Sound Recording, or similar wording.
- Change the setting and exit the menu.
If no microphone setting appears on the camera, the control may be available only through the app or another model-specific control method.
Confirm the Setting
[step] 1. Record a short 20–30 second clip while speaking clearly. 2. Transfer or open the new recording. 3. Play the original clip with normal media volume enabled. 4. Confirm that speech is present when audio recording is on, or absent when it is off. [/step] [tip] Use a newly recorded clip for verification. An older clip will keep the audio state that was active when that clip was created. [/tip]When to Disable Audio
Turning the microphone off can be useful when cabin privacy matters more than recorded sound.
- Passengers are present and you prefer not to record conversations.
- Sensitive personal or work information may be discussed in the vehicle.
- Your workplace or fleet policy limits voice recording.
- Applicable audio-recording or consent rules require additional care.
- The microphone is capturing mostly unwanted noise and video alone meets your needs.
Disabling the microphone does not remove the visual value of the recording for road position, traffic conditions, signals, or visible incidents.
[warning] Audio-recording and consent rules vary by location and use case. Consider passenger privacy and any applicable requirements before recording conversations. [/warning]When to Keep Audio On
Recorded sound can add useful context when the event itself involves audible information.
- Capturing whether a horn or warning sound was used.
- Preserving nearby shouting, threats, sirens, or other audible events.
- Adding cabin and vehicle sound context to a recorded incident.
- Recording verbal exchanges around the vehicle after a minor collision.
A practical approach is to keep audio enabled when it is useful and disable it when privacy takes priority, especially when carrying passengers or discussing sensitive information.
Improve Recording Clarity
Separate Microphone and Voice Prompt Settings
Microphone recording and camera voice prompts are different functions. If your model provides separate controls, you can keep microphone recording enabled while lowering or disabling nonessential voice prompts.
[tip] If prompt volume is adjustable, use a level that remains useful without dominating recorded cabin sound. [/tip]Reduce Wind and Airflow Noise
Strong airflow can overwhelm voices and other useful sounds.
- Keep the windows closed at higher speeds when clear cabin audio is important.
- Avoid leaving a single window slightly open if it creates strong pressure pulsing or buffeting.
- If ventilation is necessary, different window combinations may reduce pressure noise depending on the vehicle.
- Redirect nearby air vents if they blow directly toward the dash cam.
Reduce Mount and Cable Vibration
A loose mount or moving cable can add rumble, tapping, and vibration to recordings.
[checklist] * Dash cam mount is firmly attached * Power cable does not pull against the camera * Cable is not swinging against the windshield or trim * A small amount of cable slack remains near the camera [/checklist]G-sensor sensitivity affects how the camera responds to detected impacts on supported models; it does not directly improve microphone sound quality.
Keep the Microphone Area Clear
A blocked microphone opening can make voices sound quiet or muffled.
- Check for protective film around the microphone area.
- Keep dust and debris away from the opening.
- Make sure stickers, covers, mounts, or nearby trim do not block the microphone.
- Use a soft dry brush or microfiber cloth for light cleaning.
Avoid applying liquid directly around a microphone opening.
Reduce Competing Cabin Noise
Lower background noise when speech clarity matters.
- Reduce fan speed when practical.
- Secure keys, coins, mounts, or other loose objects that rattle.
- Check sunroof shades or trim that vibrate while driving.
- Keep windows closed when interior speech is the priority.
- If outside sounds are the priority, slightly open windows only when safe and accept that cabin speech may become less clear.
Keep Recording Conditions Stable
Power interruptions, storage problems, heat, or heavy camera activity can affect the continuity of a recording on some setups.
- Use a stable compatible power adapter and cable.
- Keep plugs fully seated and route cables so they are not repeatedly disturbed.
- Avoid leaving live-view streaming active for long periods while driving if repeated recording glitches appear during that use.
- If glitches repeatedly appear during high-resolution or high-frame-rate recording, test a lower recording setting if your model provides that option.
Privacy in Shared Vehicles
The microphone may record passengers, children, customers, work conversations, and other private speech inside the cabin.
[dosdonts] Do: Consider whether passengers expect their conversations to be recorded Do: Follow applicable workplace or fleet policies when the dash cam is used for work Do: Use extra care when transporting customers or rideshare passengers Do: Consider a simple recording notice where appropriate for your use and local requirements Dont: Assume that video-recording rules automatically apply to recorded conversations Dont: Leave audio enabled automatically when privacy is more important than sound evidence [/dosdonts]Basic Audio Checks
If recorded sound is missing or unclear, use these light checks before changing multiple settings at once.
[troubleshoot] Problem: A new clip has no sound Cause: Audio recording may be disabled, the setting may apply only to new clips, playback may be muted, or the recording session may need to be restarted Fix: Recheck the audio setting, record a fresh clip, test it in another media player, and restart the dash cam before testing again. If an update is offered through the normal app workflow, apply it with stable power and normal operating conditions. Problem: Audio is very quiet or muffled Cause: The microphone area may be blocked, the camera may be pressed closely against trim, or cabin and wind noise may be masking voices Fix: Clear the microphone area, make sure nearby trim or accessories are not covering it, lower cabin noise, and repeat the test with the windows closed. Problem: Audio has crackling, pops, or harsh distortion Cause: Power interference, a loose connection, unstable power, heat, or an extremely loud nearby sound may affect the recording Fix: Reseat the power connections, test with a known-good compatible adapter or cable, keep the cable away from other noisy power accessories where practical, and compare a recording with the engine on and off. Problem: Audio and video are out of sync Cause: The playback or editing app may introduce the timing difference, or the recording may have been affected by storage or processing load Fix: Play the original unedited clip first, test another player or editor, back up important recordings before formatting the memory card in the camera, and test a lower recording setting if the behavior repeatedly occurs. Problem: Audio cuts in and out Cause: Brief power interruptions, memory-card write problems, or prolonged live-view activity may interrupt recording on some setups Fix: Check power stability, use a suitable high-endurance memory card, format the card periodically after backing up important clips, and avoid leaving live view open for long periods while driving if it coincides with the interruptions. [/troubleshoot]Recording-Ready Checks
[checklist] * Audio setting matches the current privacy needs * A recent test clip contains the expected sound * Mount is secure and cable has some slack * Microphone area is clear * Power connection is stable * Memory card is maintained and important clips are backed up [/checklist]Periodically checking a random recording helps confirm that the microphone is still working before an important event occurs.
Practical Audio Profile
[reference] Title: Audio Recording Text: Keep it on when sound context is useful; turn it off when passenger or conversation privacy takes priority. Title: Voice Prompts Text: Use a lower level or disable nonessential prompts when supported if they dominate cabin recordings. Title: Windows Text: Closed windows usually provide clearer cabin speech at speed. Title: Cabin Fan Text: Moderate or lower airflow can reduce steady background noise. Title: Mount and Cable Text: Keep the mount firm and leave enough cable slack to avoid pulling or tapping. Title: Power Text: A stable compatible adapter and cable help prevent interruptions and electrical noise. [/reference]Dash cam audio does not need to sound polished. Its practical value is preserving enough sound context to understand what happened alongside the video.