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EMG Power Spectrum Analysis

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A common tool for investigating electromyography (EMG) data is the Power Spectrum Density (PSD). Use AcqKnowledge for EMG Frequency & Power Analysis to compare responses from one part of the recording to the next and for data reduction of large EMG signals. This frequency domain technique splits the EMG signal into a fixed number of time periods and runs the Power Spectral Density transformation on each epoch.

The following measurements are exported to a spreadsheet:

Data can be recorded with resuable or disposable surface EMG electrodes or needle electrodes using wired, wireless, or MRI Smart amplifiers.

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This frequency domain technique splits the EMG signal into a fixed number of time periods and runs the Power Spectral Density transformation on each epoch. The following measures are derived from the power spectrum of the EMG signal and extracted for reporting:

  • Median Frequency (Hz) – Frequency at which 50% of the total power within the epoch is reached.
  • Mean Frequency (Hz) – Frequency at which the average power within the epoch is reached.
  • Peak Frequency (Hz) – Frequency at which the maximum power occurs during the epoch.
  • Mean Power (V2/Hz*) – Average power of the power spectrum within the epoch.
  • Total Power (V2/Hz*)- Sum of the power at all frequencies of the power spectrum within the epoch.

*Units Note: V will be replaced with the voltage units in which the EMG was recorded.

Videos

BIOPAC Research Solutions | EMG

EMG - Frequency and Power Analysis

EMG - Locate Muscle Activation

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Hardware Packages   |   EMG Power Spectrum Analysis

Hardware Bundles are complete solutions for the specified application. Choose your preferred platform and bundle, then click "Request Pricing" to request an estimate, add/remove items, or complete purchase. If you have questions about specific items, click through to the product web page for details and specifications, or contact your Local Sales contact.

Wired

MP36R System

  • 1 x 4-channel Data Acquisition and Analysis System for Windows
  • 1 x Disp. Cloth electrode 30/pk
  • 1 x Lead set, shielded, BSL
  • 1 x Abrasive Pads 10/pk
  • 1 x Hand Dynamometer - MP3X

MP160 System

  • 1 x MP160 Data Acquisition System - Win
  • 1 x Active Electrodes, 35mm
  • 1 x Cbl TouchProof to 2 mm pin, 10 cm
  • 1 x Clip Lead BLK 3m TP unshielded
  • 1 x Disp. Gen-purp electrode 100/pk
  • 1 x Electrode gel 250 g
  • 1 x High-level Transducer Module
  • 1 x General Purpose Transducer Amplifier
  • 1 x Hand Dynamometer 100 kg

MP160 System

  • 1 x MP160 Data Acquisition System - Win
  • 1 x C-series Biop. Amp to Touchproof
  • 1 x Clip Lead RED 1m TP Shielded
  • 1 x Clip Lead WHT 1m TP Shielded
  • 1 x Clip Lead BLK 1m TP unshielded
  • 1 x Disp. Cloth electrode 30/pk
  • 1 x Electromyogram Amplifier
  • 1 x Abrasive Pads 10/pk
  • 1 x Electrode Impedance Checker
  • 1 x General Purpose Transducer Amplifier
  • 1 x Hand Dynamometer 100 kg

Wireless

MP160 System

  • 1 x MP160 Data Acquisition System - Win
  • 1 x Electrode Lead 3x15cm - BN/micro
  • 1 x Disp. Cloth electrode 30/pk
  • 1 x BioNomadix Wireless Pressure-Based Dynamometer with EMG
  • 1 x BioNomadix Wireless Clench Force Transducer
  • 1 x Abrasive Pads 10/pk
  • 1 x Electrode Impedance Checker

BioNomadix Logger

  • 1 x Logger with 1 transmitter
  • 1 x Electrode Lead 3x15cm - BN/micro
  • 1 x Disp. Cloth electrode 30/pk
  • 1 x BioNomadix Wireless Clench Force Transducer
  • 1 x Abrasive Pads 10/pk
  • 1 x Electrode Impedance Checker

Mobita

  • 1 x Mobita Wearable 32-Channel Biopotential System

MRI

MP160 System

  • 1 x MP160 Data Acquisition System - Win
  • 1 x MRI Cbl/Filter Sys. to Biopot. Amps
  • 3 x Clip Lead, RT, unshielded, 15 cm
  • 1 x Electrode gel 250 g
  • 1 x EMG Electromyogram Amplifier for MRI
  • 1 x Disp. Radiotranslucent Electrode, 100/pk
  • 1 x Abrasive Pads 10/pk
  • 1 x Electrode Impedance Checker
  • 1 x General Purpose Transducer Amplifier
  • 1 x Response/Hand Force for MRI

Animal

MP36R System

  • 1 x 4-channel Data Acquisition and Analysis System for Windows
  • 3 x Needle electrode Unipolar 12 mm TP
  • 1 x Electrode Lead Adapter, TP

MP160 System

  • 1 x MP160 Data Acquisition System - Win
  • 1 x C-series Biop. Amp to Touchproof
  • 3 x Needle electrode Unipolar 12 mm TP
  • 1 x Electromyogram Amplifier
  • 1 x Electrode Impedance Checker
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