ABSTRACT
Spectrum analyzers are very handy. However, more sophisticated measurements are often needed. For that purpose, there are several advanced, commercially available, and easy-to-use software packages to consider. An impulse is a sound of short duration but with the widest possible frequency content. Thus the impulse response is how a device, sound system, or room reacts to that impulse. Analyzing the impulse response of a room provides information on the reverberation time of that room. Some measurement systems are based on two-channel input. This can be for synchronization purposes, or it can be for the analyses of differences between two points in a sound chain. The measurement of the transfer function is a measure that requires two inputs. A spectrograph is an instrument that can simultaneously display three parameters or dimensions of an audio signal. The spectrograph is used in particular for voice analysis (both humans and animals), utilizing filters with both narrow and relatively large bandwidth.
