120hz buzz typically caused by ground loops and 60hz hum typically a result of poor shielding cable problems or close proximity to strong magnetic fields.
How to determine your floor sound in a studio.
There are two basic types.
I have done no sound treatment to the closet yet.
The materials that the walls and ceiling and floor are made of and covered with.
A typical iic for high rise construction is 50 meaning that the floor reduces structure borne noise by 50 db on average.
How many doors and windows are there and where they are placed location of the microphone and voice other actor in relation to the nearest walls etc and the contents of the room furniture tapestry equipment etc.
Another method of measuring noise floor is using a sound pressure level spl meter.
Keep in mind this was before using any noise reduction and also before normalizing to 3db audible requirement.
Rt60 is the time it takes for the sound pressure level to decay by 60 db.
But small rooms like most listening mixing rooms don t have true reverberation and it s not always possible to measure 60 db of decay.
To determine which of these you have listen to the two examples.
When this is not enough try thickening the walls with another layer of drywall or placing some acoustic tiles.
Acoustic underlayment should be installed under framing if necessary on the floor above and should completely cover the floor so that paths of least resistance do not develop.
First you should determine the type of hum you are dealing with.
This reduces reflections from the front and side walls and helps to tame boomy bass.
Am i correct that i can call those numbers my noise floor.
If you dig a little deeper into the internet you ll find many solid ways to measure your noise floor.
The distances from the side walls are equally important.
This is a video diary showing how i converted my garage into a fully functioning sound proof drum room studio.
The shape and dimensions of the room.
Apply the golden rectangle rule.
Place a carpet over the floor when there is a hardwood or tile floor as this will absorb the sound better.
In architectural acoustics we use reverberation time t60 or rt60 to measure liveliness.
How to measure and analyze.
The cellar walls and foundations will be holding up the house s many tons of brick cement and plaster and their stability is dependent on a solid base of earth.
How your recording affected by the way sound waves behave in a room depends on a number of factors the frequency of the sound wave.
Before moving your equipment get some absorptive foam on the walls to improve the sound in the room.
If your room permits try placing the speakers about 3 feet from the front wall.