A composite interference pulsation dampener that has no moving parts, which results in the high reliability and efficiency of the dampener on wide intervals of frequencies, temperatures, pressures, and flow velocities. The device consists of modified interference disks separated by spacers, a hood, and covers. A modified interference disk is a hard disk with a central channel, secondary channels, and orifices/holes. The configuration of the device is optimized to reach a desirable performance in a given hydraulic/pneumatic system and to minimize the sizes, weight, and cost of the device.