16. Acoustical defects 17.  This defect is the out come of formation of sound foci.  Because of high concentration of reflected sound at sound foci , there is deficiency of related sound at some other points.  These spots are known as dead spots where sound intensity is so low that it is insufficient for hearing.

What is acoustical system?

Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. … Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or marking territories.

What causes bad acoustics in a room?

The Most Common Causes of Poor Room Acoustics. Hard surfaces such as bare floors and walls and hard furniture such as wooden or metal tables, chairs and counters all have a detrimental effect on room acoustics.