FAQ regarding the RT60 Calculator
If you've had any issues, have a look below and see if your question has been answered. Otherwise, look here. This will grow over time as popular questions are added.
How can I support the development of this program?
If you use this program, please consider donating a little bit. The developer has written this program off his own back and has released it as Open Source (GPLv2). He asks that you help support this project. To do so, click here:
You will need PayPal in order to carry out a transaction.
I want to report a bug or request a feature.
Look here.
Which result should I use?
The RT60 Calculator currently offers three sets of results for any given room, as calculated by the various formulae it uses. These are the Sabine formula, the Norris-Eyring formula and the Fitzroy formula. In short, it is a general recommendation that the Sabine result should be used for 'live' rooms (i.e. very reflective, α < 0.3), the Norris-Eyring result should be used for 'dead' rooms (i.e. very absorptive, α → 1) and the Fitzroy formula should be used for the mid-range rooms. However, it is worth noting that the Fitzroy formula can be unreliable at low frequencies. [1] [2]
How does the program work?
The RT60 Calculator was written in Python due to it's extensibility, flexibility and ability to run on any OS. It uses the formulae described on the About page to calculate the amount of time that a 60dB sound would take to die out. It uses MatPlotLib for the graph-plotting and wxWidgets for the user interface.
Will the program be ported to Mac?
Good question - although it's a moot point at the moment, as even if I wanted to (which I do) and I was confident that all of the required modules would compile correctly (which I'm not), I haven't got access to a Mac to compile it on.
Resources:
[1] Prediction of the Reverberation Time in Rectangular Rooms with Non-Uniformly Distributed Sound Absorption (R. Neubauer, B. Kostek)
[2] Integrated assessment of room acoustics and thermal performance in ESP-r (Stephane Citherlet)
How can I support the development of this program?
If you use this program, please consider donating a little bit. The developer has written this program off his own back and has released it as Open Source (GPLv2). He asks that you help support this project. To do so, click here:
You will need PayPal in order to carry out a transaction.
I want to report a bug or request a feature.
Look here.
Which result should I use?
The RT60 Calculator currently offers three sets of results for any given room, as calculated by the various formulae it uses. These are the Sabine formula, the Norris-Eyring formula and the Fitzroy formula. In short, it is a general recommendation that the Sabine result should be used for 'live' rooms (i.e. very reflective, α < 0.3), the Norris-Eyring result should be used for 'dead' rooms (i.e. very absorptive, α → 1) and the Fitzroy formula should be used for the mid-range rooms. However, it is worth noting that the Fitzroy formula can be unreliable at low frequencies. [1] [2]
How does the program work?
The RT60 Calculator was written in Python due to it's extensibility, flexibility and ability to run on any OS. It uses the formulae described on the About page to calculate the amount of time that a 60dB sound would take to die out. It uses MatPlotLib for the graph-plotting and wxWidgets for the user interface.
Will the program be ported to Mac?
Good question - although it's a moot point at the moment, as even if I wanted to (which I do) and I was confident that all of the required modules would compile correctly (which I'm not), I haven't got access to a Mac to compile it on.
Resources:
[1] Prediction of the Reverberation Time in Rectangular Rooms with Non-Uniformly Distributed Sound Absorption (R. Neubauer, B. Kostek)
[2] Integrated assessment of room acoustics and thermal performance in ESP-r (Stephane Citherlet)