Handbook for Sound Engineers

1392 Chapter 36 systems in low but noisy spaces. The AI method is not able to take account of room reverberation or reflections. ...

Designing for Speech Intelligibility 1393 It must not be forgotten that any noise occurring at the microphone itself will reduce ...

1394 Chapter 36 high (i.e., a low Q device is used), then the “ba” sound will have only decayed by approximately 18 dB and will ...

Designing for Speech Intelligibility 1395 same TEF data (see Section 36-13 on measuring intelli- gibility) are: •%Alcons 4.2%. ...

1396 Chapter 36 means of traditional statistical acoustics, it is not possible to accurately estimate, on a statistical basis, t ...

Designing for Speech Intelligibility 1397 The %Alcons equations work well with single point or center cluster systems or even sp ...

1398 Chapter 36 and particularly in distributed loudspeaker systems, a considerable number of early reflections and sound arriva ...

Designing for Speech Intelligibility 1399 would appear to be rather more detrimental. Fig. 36-27 shows the ETC measured on the s ...

1400 Chapter 36 Where listeners are free to move about—e.g., on a concourse or in a shopping mall—it may be possible to have a g ...

Designing for Speech Intelligibility 1401 Comparison for high-frequency losses caused by long cable runs or excess atmospheric ...

1402 Chapter 36 better than others and so the resultant broadcast announcements are also inherently clearer. However, it must no ...

Designing for Speech Intelligibility 1403 Provide a quiet area or refuge for the announcement microphone or use a good quality ...

1404 Chapter 36 36.14.2 Objective Measures and Techniques 36.14.2.1 Articulation Index The Articulation Index (AI) was one of th ...

Designing for Speech Intelligibility 1405 measures include C35, whereby the split time is taken as 35 ms and also sometimes C7 w ...

1406 Chapter 36 has to be reasonably linear and exhibit a well-extended frequency response. Unfortunately many paging and voice ...

Designing for Speech Intelligibility 1407 The first commercially available instrument that could measure STI was the RaSTI meter ...

1408 Chapter 36 most of the problems associated with RaSTI. However, just as with STI, it is a far from perfect measure and ther ...

Designing for Speech Intelligibility 1409 announcement system may be required to meet category “G” or above whereas a high-quali ...

1410 Chapter 36 to rapidly expand. As DSP technology continues to grow and as our understanding of psychoacoustics and speech co ...

Designing for Speech Intelligibility 1411 J. P. A. Lochner and J. F. Burger, “The Intelligibility of Reinforced Speech,” Acustic ...