By ORYX Healthcare November 2025
EMG test noise is one of the most common issues during electromyography. A clean signal is essential for accurate diagnosis, yet many tests show unexpected noise or artifacts.
1. Poor Ground Electrode Contact , A Major Cause of EMG Test Noise
If the ground electrode is not placed correctly, the EMG machine may detect background electrical activity.
How to fix it:
– Clean the skin properly
– Use high-quality adhesive electrodes
– Ensure full contact before starting the test
2. Cable or Connector Interference Causing EMG Test Noise
Loose, bent, or damaged cables can introduce unwanted noise into the signal.
How to fix it:
– Check the cable connection before each test
– Replace worn or cracked cables
– Use shielded, high-quality EMG cables for stable performance
(ORYX cables are designed to minimize signal interference.)
3. Patient Muscle Tension or Movement
Even small movements can create artifacts, especially in sensitive recordings.
How to fix it:
– Ask the patient to relax completely
– Support the limb if needed
– Remind the patient to avoid sudden movements
4. Electromagnetic Interference from the Environment
Common sources include:
– Mobile phones
– Monitors
– Power supplies
– Nearby medical devices
How to fix it:
– Remove unnecessary electronics from the room
– Keep cables away from power lines
– Use a clean signal environment
5. Low-Quality or Damaged EMG Needle and Its Impact on EMG Test Noise
A dull or poorly constructed needle can cause signal distortion.
Irregular tip geometry increases noise and reduces recording quality.
How to fix it:
– Use sterile, high-precision EMG needles
– Replace the needle if the signal becomes unstable
– Choose brands with strict ISO 13485 and MDR compliance
ORYX EMG needles are engineered for minimal noise and consistent signal clarity, thanks to:
– Precision-ground tip geometry
– Medical-grade stainless steel
– Strict lot-to-lot quality control under ISO 13485
Most EMG noise problems have simple solutions:
Better ground contact, better cables, a relaxed patient, a cleaner environment, and a high-quality needle.
At ORYX Healthcare, our EMG needles are engineered to help clinicians reduce EMG test noise and achieve clearer diagnostic results.
Learn more about needle performance in our article:
How Needle Tip Geometry Impacts Signal Precision
