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#Import recording into fuzzmeasure full
#Import recording into fuzzmeasure pro
#Import recording into fuzzmeasure software

As mentioned earlier, the measurement microphone and listening position were defined for these tests at the exact centre of room length and height. The following two pictures show the graph generated with REW we used to fill the table above.įinally, the time reported at 63 Hertz are likely associated with the microphone emplacement. The RT60 time in the following table were extracted from the Left and Right Speaker Sweep Test.

#Import recording into fuzzmeasure pro

Measurements could be extract from the Pro Tools waveforms but the REW has a calculation engine producing graphs showing RT60 time at different frequency ranges. So in case of the clap being recorded before the sound in the room last longer that the one produce by the speaker. More specifically RT60 refers to the time it take for a sound to drop 60 dB once this source is cut. The RT60 numbers are use to describe the reverberation time the room will induce to the overall sound. The alternate Bob Golds report shown hereĬonfirm this to be associated with a tangential mode of high energy content when the narrow width of 366 cm, the back portion is considered. It confirms that the back of the room width is still critical in the room sonic behaviour. This has been consistent over several measurements. On this one we have focus on the 20 to 400 Hertz range, basically looking at modes below the critical frequency Fc of 244 Hz. Here are the results for the same room dimensions using the AMROC Room Mode Calculator. For this reason we have use the average width of 392 centimetre to calculate the room modes. As mentioned before the room has two different widths and therefore would require more complex calculation. One of the challenges faced with the room we chose is the irregular shape. Room mode can be calculated using various Internet Site calculators and the Spread Sheet made by Guy Cooper. Room mode calculations allow us to understand some of the causes of room frequency response peaks and dips. However, compare with the REW results above, the long decay below 80 Hertz does not appear to be as prominent. We can also observe almost the same peak and dip in the low frequencies dip just above 100 Hertz and peak in the 200 to 300 Hertz area. We can observe more or less a similar response graph as with REW. The following two pictures show the Sine Wave Sweep made using the Left and Right speakers with the reference microphone above the engineers seat.

#Import recording into fuzzmeasure software

REW includes a level check function with ensure the test is being made within the software allowed range.

#Import recording into fuzzmeasure full

However, with the sine wave sweep, REW can extract the slop angles under reduce range and extrapolate the full RT60 time. This level may not be sufficient for accurate RT60 measurements from an impulse as it need a 60 dB drop. Several tests were made to ensure the level was sufficient, above 75 dB. I have also calibrated the microphone in REW so the reported graphs are reasonably accurate, or at least with in the range of level indicated. All sine wave sweep tests were ran with both the window and the door close to reproduce most likely listening and recording conditions. Once again, the reference microphone was placed at the current listening position, few centimetres above the engineer’s head.

Guy Cooper Excel spreadsheet calculatorĪfter these attempts of recording impulse response, I have redirected my efforts toward the use of the room analysis software, running sweep signal response tests.

The different software use for the tests:Īdditional On-Line and calculation tools: A low cost sound level meter was use to measure noise level and to calibrate the measurement software application. Also most tests were conducted whit he engineer standing outside of the room. All tests were ran with both the window and the door close to reproduce most likely listening and recording conditions. As mentioned before, this is the exact centre of the room in length and height.

The reference microphone was always place at the set listening position, few centimetres above the engineer’s head. But his will the position we will refer to in this blog.Īccording to Bolt, this is not a good room.Īll the recordings and measurements were made using a DBX Pro RTA-M reference microphone with a Shure Xu2 XLR-to-USB Interface connected to a MacBook Pro laptop. Currently, this brought the listening position to the centre of the room, which is not recommended. The current speakers and desk setup is base on preliminary readings recommending an equal distance between the speakers and the engineer’s head.

The furniture and equipment layout is still embryonic and may change in the future.

A desk made of a Stratocaster and speaker cases,.

Another large bookshelf can be seen on the right wall,.

Two 2 large bookshelves fill the back wall, the remaining space is the door.

Most of the room content appears on the pictures. Most of the wall and ceiling are still bare. There is only a small window on the front wall, 180 cm wide by 60 cm high.