MTF measurement uses amplitude-modulated noise bands across 0.63 to 12.5 Hz

Evidence

A straightforward method to measure the MTF is to use a loudspeaker or an artificial mouth in a room or in an auditorium in the position where the speaker would be. The source is used to emit 100% amplitude-modulated octave-band noise (m0=1.0) at a level corresponding to the average level of speech. The measurement is repeated for each modulation frequency fm, from 0.63 Hz to 12.5 Hz in steps of 1/3 octave, as shown in Figure 17.9. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2416

Categorization

• DEFINE: Spells out the concrete operational definition of MTF measurement as an emissions-and-probe procedure.