1. Environment

Background Noise
- Avoid recording in environments with air conditioners, fans, street noise, or computer fans.
- Use windscreens outdoors to reduce wind noise.
- For indoor recording, treat reflective spaces (glass, tiles, empty rooms) with curtains, carpets, or acoustic panels.
Microphone Wearing Position
- Keep the transmitter close to the sound source (e.g., collar, chest) to minimize environmental noise.
- Avoid covering the mic with clothes to prevent friction noise.

2. Wireless Transmission

Signal Interference
- These mics often use the 2.4GHz band, which easily conflicts with Wi-Fi and Bluetooth.
- Solution: turn off unnecessary Wi-Fi/Bluetooth devices during recording; if supported, try switching channels.
Obstructions & Distance
- Ensure clear line-of-sight between the transmitter (TX) and receiver (RX).
- Stay within the manufacturer’s recommended range (typically 30–50m).
- Avoid placing RX near metal stage trusses or lighting equipment that may cause reflections.

Receiver Output Mode
- Confirm the correct TRRS/Lightning/Type-C cable when connecting to smartphones.
- Use TRS cables for cameras and ensure the orientation is correct.
- Loose plugs or poor contact can introduce static noise.
Gain Matching
- Excessive gain on the transmitter will increase background noise and distortion.
- Improper input levels on the receiver or smartphone/camera also cause noise.
- Recommended:
  - Set TX gain to a medium level.
  - Keep RX/smartphone/camera input around 50% and fine-tune as needed.
Power Supply
- Low battery can introduce noise or signal instability.
- Always use original batteries/charging case and keep the devices fully charged.

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:

If it’s environmental noise → use windscreens, isolate sound, get closer to the source.
If it’s wireless interference/obstruction → keep line-of-sight, reduce distance, disable Wi-Fi.
If it’s device/connection-related → check gain, battery, cables, and interfaces.