Melacoustic foam panels combined with aluminum foil and back adhesive is a lightweight porous material with an open porosity rate exceeding 99%. It possesses inherent flame retardancy and outstanding properties such as sound absorption and noise reduction, thermal insulation, cushioning and shock absorption, as well as environmental safety. It finds wide applications in flame-retardant and cold-proof materials for high-speed rail, EMU, subway, and other rail transit systems. Through compounding with smooth and flat aluminum foil, the overall physical strength and insulation performance are further enhanced.