[ f_n = \frac12\pi \sqrt\frackm ]
| Material | Density (kg/m³) | Young’s Modulus (MPa) | Max Temp (°C) | Loss Factor @ 100 Hz | Best for | |----------|----------------|----------------------|---------------|----------------------|-----------| | Neoprene | 1200–1500 | 5–20 | 90 | 0.1 | General industrial | | EPDM | 1100–1300 | 3–15 | 120 | 0.12 | Outdoor/weather-resistant | | Silicone | 1100–1800 | 1–10 | 230 | 0.08 | High temp/cleanroom | | Polyurethane | 1100–1250 | 10–50 | 80 | 0.2 | Heavy loads, abrasion | wave pads
Surface patterns are molded or die-cut. Typical thickness: 6–25 mm. Load ratings: 50–5000 kPa. 4.1 Methodology A standardized test was conducted using an electrodynamic shaker (10–500 Hz) exciting a 50 kg steel mass mounted on four 100×100×12 mm wave pads (neoprene, 40 Shore A). Acceleration was measured on the source mass and on the base plate. Insertion loss (IL) was computed as: [ f_n = \frac12\pi \sqrt\frackm ] | Material
For typical steel-elastomer-steel sandwich, ( T \approx 0.01 ) at normal incidence, providing 20 dB reduction. A wave pad acts as a spring-mass system. The mounted equipment (mass ( m )) sits on pads with total stiffness ( k ). The natural frequency ( f_n ) is: A wave pad acts as a spring-mass system
[ T = \frac4Z_1Z_2(Z_1+Z_2)^2 ]