Acoustic noise reduction apparatus for personal computers and electronics

An acoustic noise reduction apparatus for reducing noise generated by one or more fans of a computer tower comprising:

• a removably adjustable acoustic barrier member externally attached to a rear of a chassis of the computer tower around the one or more fans, the barrier member having an inner surface;
• acoustic absorbing material attached to the inner surface of the barrier member;
• a means for attaching the barrier member to the computer tower chassis;
• wherein the barrier member is adjustable to a width of the computer chassis and attached to the chassis such that airflow is substantially unobstructed and airflow loss from the one or more fans is negligible.

An acoustic noise reduction apparatus for reducing noise generated by one or more fans of a computer tower comprising:

• a removably adjustable acoustic barrier member externally attached to a rear of a chassis of the computer tower around the one or more fans, the barrier member further comprising a plurality of removable sections, including a firm cantilever section and one or more flexible side sections, wherein each section having an inner surface;
• at least one pair of guide rails disposed on the cantilever section for a side section to slide into for adjusting the positioning of a side section to a width of the computer chassis;
• acoustic absorbing material attached to the inner surface of the barrier member sections;
• a means for attaching the barrier member sections to the computer tower chassis;
• wherein the barrier member sections are attached to the chassis such that airflow from the one or more fans is redirected and airflow loss is negligible.