Vibration Isolation Efficiency Calculator
Calculate vibration isolation efficiency and transmissibility from excitation and natural frequency inputs.
Isolation System Inputs
Frequency of the vibrating source or machinery
Determined by mount stiffness k and mass m: f_n = (1/2π)√(k/m)
Typical rubber: 0.05–0.10 | Steel spring: ~0
Sample Inputs
Enter frequencies above to compute isolation efficiency
Excitation / natural frequency ratio drives the result
Frequency Ratio r
—
fexc / fn
Transmissibility T
—
Force ratio (mount output / input)
Isolation Efficiency
—
Full Calculation Breakdown
Summary
Calculate vibration isolation efficiency and transmissibility from excitation and natural frequency inputs.
How it works
- Enter the excitation frequency (the frequency of the vibrating source, in Hz).
- Enter the natural frequency of the isolation system (determined by mount stiffness and supported mass).
- Optionally enter a damping ratio to model viscous damping effects.
- The calculator computes the frequency ratio r = f_excitation / f_natural.
- Transmissibility T and isolation efficiency E = (1 - T) × 100% are displayed instantly.
Use cases
- Design rubber or spring vibration mounts for rotating machinery.
- Assess whether an existing isolation system is effective at a given operating speed.
- Compare isolation performance across different mount stiffness configurations.
- Determine minimum natural frequency needed to achieve a target isolation efficiency.
- Evaluate damping trade-offs: higher damping reduces resonance peak but reduces isolation at high frequencies.
Frequently Asked Questions
Last updated: 2026-07-26 ·
Reviewed by Nham Vu