A soundproof test chamber (sometimes known instead as an anechoic chamber or acoustic enclosure) is a space designed entirely to absorb sound reflections and prevent noise from entering or escaping. These spaces can be of any size and they are generally used for activities requiring the minimal noise interference that its possible to achieve. People use soundproof chambers for recording music or sometimes for scientific experiments that would be negatively affected by sound. Lithium Battery Test Chamber Manufacturer

For both safety and comfort don't forget that air needs to circulate freely through the room. That particularly important if you are planning to spend long amounts of time inside the space you are soundproofing. Before you do anything else, begin by installing both an air inlet and outlet which will keep the air inside the space fresh. Your air system should also incorporate a fan as this will ensure the air is able to circulate. Aim to space the air inlet and outlet as wide apart as is possible to keep the air fresh and moving.

It isn't essential to cover windows completely and you may prefer to have natural light coming into your chamber. Glass windows can be covered with double window glazing and sheets of tightly-sealed acoustic glass to soundproof them without excluding the light.

If the door to your room is already made of a heavy material such as thick wood then you won't need to do very much to it. However if the door is made of a lighter material such as plywood or plastic, consider using a material such as vinyl Sheetblok to increase the weight and the sound-blocking quality of the door. Make sure the seal is tight to the frame - you can purchase sealing strips to assist with making a tight door seal.

The best way to construct a soundproof chamber is to aim for a 'room within a room' style of construction. If you've enough space, and want a permanently soundproofed space that won't need to be dismantled anytime soon, then you can get hold of some high-density concrete blocks and use these to construct an inner space. The blocks need to be placed on a bottom floor layer of sound-insulating neoprene rubber. The inner roof can be made using a lighter material such as plywood and in the inner space between the outer and inner rooms, use mineral wool for additional noise insulation. Remember to insulate air inlets and outlets without blocking the air supply and flow. Remember also your power needs to come in from somewhere.