Speed of sound is determined by a combination of environmental factors. This applet has the temperature and humidity, two major factors, as its inputs. It computes the speed of sound at the given conditions.
RT60 is an acoustical measurement used to compute the reverberation time decay, which means the time a signal takes to fall -60db. This applet has the room's measurements, surface materials, and other optional information as its inputs. It draws the reverberation time graph according to the given data.
For a certain room, there are three types of resonance frequency: axial, tangential and oblique. They are determined by the room's measurements. The applet has the room's measurements as its inputs. It draws the distribution graphs and data analysis table according to the given data.
Detailed documentation for the Java source code is available in javadoc format.
Java application is also available.