There are many discussion related to swept sine, measurement technique, reverberation, and measurements are presented in the application note. In the application note you can learn info related to background noise level, noise excitation, impulse, and pink noise excitation.
This application note presents info around swept sine measurement, distortion, harmonic distortion, and noise. These are selected from this application note:
Application Note AN 121 SweptSine Ed.3 Rev.0 English 10.06 Swept Sine Measurement Technique Using the Nor121 Analyser Applications • Measurements in high background noise • Measurements of high sound reduction indices • Measurements of short reverberation times • Robustness against time-variance • Suitability for outdoor measurements The swept-sine method uses excitation signal of a sinusoidal shape whose frequency increases exponentially with the time. Levels of excitation in sending room 70 Background noise level L2, Swept-sine 60 L2, Paralel noise excitation L2, Serial Excitation 50 40 30 20 kH z 2 50 0 H z 10 H z The background noise level in the receiving room was 45 dB at low frequencies and 25 dB at high frequencies.
Also, the application note explains information regarding sine measurement, frequency, background noise, and the background noise.