TYPICAL PRECAST SOUND ABSORBING CONCRETE NOISE BARRIER PANEL A typical Whisper Wall sound absorbing noise barrier wall panel is eight (8") inches thick, four (4") inches of sound absorptive mixture and four (4") inches of structural concrete. Whisper Wall panels are designed to be "stacked" to the walls required elevation. Cast into the top and bottom of each panel is a tongue and groove keyway that aligns and interlocks each panel along the horizontal joint. Panels can span up to a distance of twenty-four (24') feet and have been stacked as high as fifty-four (54') feet.
Whisper Wall is erected using the top-down construction method. This method varies the height of the bottom panel and allows full height panels to be stacked up to the sound attenuation elevation. Using the top-down method minimizes the number of horizontal joints.
Many different formliner designs can be used to create a variety of unique highway sound absorbing surfaces that are both aesthetically pleasing and effective at absorbing sound energy.
Whisper Wall absorbs up to 85 percent of the noise.
Whisper Wall noise barrier panels are designed to be used with either concrete or steel surpport post.