1. Specflex. Available from:https://www.dow.com/en-us/product-search/specflexpolyurethanesystems.
2. Last‐A‐foam. Available from:https://www.generalplastics.com/products.
3. Rohacell. Available from:https://www.rohacell.com/product/rohacell/en/processing/.
4. Rogers. Available from:https://www.rogerscorp.com/ems/bisco/index.aspx.
5. Polydamp. Available from:https://www.polytechinc.com/products/acoustic-foam.