Per 
Item #: SCP-XXXX
Object Class: Keter
Special Containment Procedures:
SCP-XXXX is to be housed in an underground airtight and functionally soundproof chamber located 200 kilometers below Site-81: The chamber is to be outfitted with foundation grade sound level meters and cameras. No personell is to be stationed in the chamber; As of 8/12/2018 decibel levels were measured at █73 dB, far above what would kill a normal human being. The containment chamber does not possess an entrance, as this was theorized to act as an escape point for sound waves. SCP-XXXX itself is located inside a lead cube located in the center of the room, coated with a Magnusson-Farday sound repellant. While this setup has proved effective so far, it's currently theorized that the built up pressure will shatter the steel cube in ██ years, and shatter the room itself in another 19 years. In the event that this happens a ZK-class end of the world scenario will be declared. Research into permanenly neutralizing SCP-XXXX is to be considered a class-A priority.
Several tests were conducted before SCP-XXXX was moved into it's current containment in order to establish the feasibility of destroying SCP-XXXX including, but not limited to;
-power drilling
-smelting
-nuclear detonation
-[REDACTED]
It should be noted that in the case of [REDACTED] sound emissions increased by 20% over a course of 10 days; This might be a side effect of the method used, but could also show limited sentience.
Description:
SCP-XXXX is 1 70x20cm stone statue of "Kikazaru", a monkey covering his ears theorized to have originated in 17th century Japan. At periodic intervals ranging from 20-75 hours, SCP-XXXX will emit a high pitched "screech", capable of penetrating all solid surfaces and objects with no obserable limit being found. This "screech", hereafter referred to as SCP-XXXX-1, seems to layer itself in the surrounding air, and staying after a screech event has occured, or SCP-XXXX has moved. Inspection of the air after a screech event has shown that SCP-XXXX-1, instead of moving and dissipating normally, move in a circular pattern until they hit the walls of a room, not decreasing in strength meanwhile. After these sound waves have hit a wall. they stop entirely, but keep exciting the air; All subsequent emissions by SCP-XXXX stop at this same border. It should be noted that in cases where a room is expanded equally radially, SCP-XXXX-1 expands to fill the new room. This does not apply if the area is expanded unevenly, as the area covered by SCP-XXXX-1 is always a perfect circle.
Addendum:
Before the current containment procedures were put in place, a proposal was put forth to have a containment chamber with irregularly spaced semi circles acting as walls, placed throughout the entire room. This was deemed too expensive, and was never implemented. It has been theorized that implementing this containment would have added an additional ███ years to the chambers life span.
An entrance that wouldn't interfere with the containment chambers circular design was also considered, though rejected due to safety concerns. An entrance would allow for the remote controlled entrance of robots, potentially allowing for unlimited maintenance and upgrade.
Both of these faults can at core be boiled down to concerns with time; While the containment chamber was being constructed, SCP-XXXX was housed at ██ temporary locations in total, leading to the deaths of ███ civilian and SCP personell after the structure ruptured. It was eventually decided that a more complex design would add months, if not years, to the construction time, which simply wasn't preferred at the time. It should also be noted that while the containment chamber was being built the full extents of SCP-XXXX's effects were not understood. This may or may not have contributed.
