Speaker cone material or diaphragm material is the most important part of any speaker. The speaker cone material helps speaker cone in converting voice coil vibrations into audible sound. The speaker cone material helps in dispersion of sound frequencies throughout the listening environment. The speaker cone material possesses various properties, such as low mass, low coloration and controlled resonance. Polypropylene was used as a speaker cone material in the past. However, now, it has been replaced with a variety of materials, such as aluminum, kraft paper and other polymers. Metal speaker cone materials provide high durability and prevent dynamic compression and distortion.