Spatial averaging of measurements suppresses interference artifacts while preserving spectral information

Evidence

Measurement technique therefore matters. There is merit in spatial averaging, combining multiple measurements made at different angles, to minimize near-field measurement artifacts that appear in single measurements. I began spatially averaging data as soon as a digital system permitted it; see Figure 2.4. In spinorama measurements the on-axis frequency response is shown, but reliance is also placed on the spatially averaged listening window curve because it attenuates residual acoustical interference effects. All other spinorama curves are spatial averages of multiple measurements, again attenuating evidence of acoustical interference while retaining spectral balance information and evidence of resonances. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1270

Categorization

• XREF: Connects to the spinorama measurement convention widely used in loudspeaker reviews and industry testing. — connects to: Octave-band averaging can blur perceptually noticeable absorption variations — David Howard, Jamie Angus, coustics and Psychoacoustics, 1910