1. Environment
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Background Noise
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Avoid recording in environments with air conditioners, fans, street noise, or computer fans.
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Use windscreens outdoors to reduce wind noise.
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For indoor recording, treat reflective spaces (glass, tiles, empty rooms) with curtains, carpets, or acoustic panels.
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Microphone Wearing Position
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Keep the transmitter close to the sound source (e.g., collar, chest) to minimize environmental noise.
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Avoid covering the mic with clothes to prevent friction noise.
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2. Wireless Transmission
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Signal Interference
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These mics often use the 2.4GHz band, which easily conflicts with Wi-Fi and Bluetooth.
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Solution: turn off unnecessary Wi-Fi/Bluetooth devices during recording; if supported, try switching channels.
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Obstructions & Distance
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Ensure clear line-of-sight between the transmitter (TX) and receiver (RX).
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Stay within the manufacturer’s recommended range (typically 30–50m).
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Avoid placing RX near metal stage trusses or lighting equipment that may cause reflections.
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3. Device Connections & Settings
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Receiver Output Mode
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Confirm the correct TRRS/Lightning/Type-C cable when connecting to smartphones.
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Use TRS cables for cameras and ensure the orientation is correct.
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Loose plugs or poor contact can introduce static noise.
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Gain Matching
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Excessive gain on the transmitter will increase background noise and distortion.
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Improper input levels on the receiver or smartphone/camera also cause noise.
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Recommended:
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Set TX gain to a medium level.
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Keep RX/smartphone/camera input around 50% and fine-tune as needed.
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Power Supply
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Low battery can introduce noise or signal instability.
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Always use original batteries/charging case and keep the devices fully charged.
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4. Common Noise Types & Solutions
| Noise Type | Possible Cause | Solution |
|---|---|---|
| Background hiss | High TX gain, low battery, electromagnetic interference | Lower TX gain, match RX input; keep devices charged; avoid USB 3.0 ports, LED lights, power adapters |
| Dropouts / pops | TX & RX blocked or too far apart; channel interference | Ensure line-of-sight; shorten distance; disable nearby Wi-Fi/Bluetooth |
| Clothing rustle | Mic covered by clothes | Adjust wearing position; use windscreen or magnetic clip |
| Hum / static noise | Incompatible or poor cables, loose connection | Use original TRS/TRRS/Type-C cables; replug firmly |
| Environmental noise (wind, chatter) | Outdoor or noisy scene | Use windscreen; stay close to the sound source; apply noise reduction in post |
📌 Summary:
When recording noise occurs, first identify the source:
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If it’s environmental noise → use windscreens, isolate sound, get closer to the source.
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If it’s wireless interference/obstruction → keep line-of-sight, reduce distance, disable Wi-Fi.
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If it’s device/connection-related → check gain, battery, cables, and interfaces.