critical: Constants Tables for ANSI S3.5-1997 Speech Intelligibility...

In SII: Calculate ANSI S3.5-1997 Speech Intelligibility Index

Description

Tables of constants for ANSI S3.5-1997 Speech Intelligibility Index (SII)

Usage

data(critical)
data(equal)
data(onethird)
data(octave)
data(overall.spl)

Format

Each data frames has 6-21 observations and a subset of the following variables:

fi

Center frequency of SII band, Hz

li

Lower limit of frequency band, Hz

hi

Upper limit of frequency band, Hz

Deltai

Band width adjustment, dB

Ii

Band importance function

normal, raised, loud and shout

Standard spectrum levels for vocal effort levels "normal", "raised", "loud", and "shout", respectively, dB

Xi

Spectrum level of internal noise, dB

Fi

Band importance function (weight)

Details

These data objects provide constant tables 1 – 4 from the ANSI S3.5-1997.

critical

Table 1: Critical band SII procedure constants

equal

Table 2:Equally contributing (17 band) critical band SII

onethird

Table 3: One-third octave band SII procedure constants

octave

Table 4: Octave band SII procedure constants

overall.spl

Overall sound pressure level (SPL) for the for vocal effort levels "normal", "raised", "loud", and "shout", in dB

Source

ANSI S3.5-1997, "American National Standard Methods for Calculation of the Speech Intelligibility Index" American National Standards Institute, New York.

References

ANSI S3.5-1997, "American National Standard Methods for Calculation of the Speech Intelligibility Index" American National Standards Institute, New York.

Examples

data(critical)
critical # show entire table

data(equal)
names(equal)
equal$fi # extract just the frequency band centers

data(onethird)
barplot(onethird$Ii) # plot band importance function (weights)

data(octave)
round(octave, digits=2) # just 2 digits

data(overall.spl)
overall.spl

Example output

     fi   li   hi     Ii normal raised  loud shout    Xi   Fi
1   150  100  200 0.0103  31.44  34.06 34.21 28.69   1.5  0.6
2   250  200  300 0.0261  34.75  38.98 41.55 42.50  -3.9  1.0
3   350  300  400 0.0419  34.14  38.62 43.68 47.14  -7.2  1.4
4   450  400  510 0.0577  34.58  39.84 44.08 48.46  -8.9  1.4
5   570  510  630 0.0577  33.17  39.44 45.34 50.17 -10.3  1.9
6   700  630  770 0.0577  30.64  37.99 45.22 51.68 -11.4  2.8
7   840  770  920 0.0577  27.59  35.85 43.60 51.43 -12.0  3.0
8  1000  920 1080 0.0577  25.01  33.86 42.16 51.31 -12.5  2.6
9  1170 1080 1270 0.0577  23.52  32.56 41.07 49.40 -13.2  2.6
10 1370 1270 1480 0.0577  22.28  30.91 39.68 49.03 -14.0  3.6
11 1600 1480 1720 0.0577  20.15  28.58 37.70 47.65 -15.4  6.1
12 1850 1720 2000 0.0577  18.29  26.37 35.62 45.47 -16.9 10.5
13 2150 2000 2320 0.0577  16.37  24.34 33.17 43.13 -18.8 13.8
14 2500 2320 2700 0.0577  13.80  22.35 30.98 40.80 -21.2 16.8
15 2900 2700 3150 0.0577  12.21  21.04 29.01 39.15 -23.2 15.8
16 3400 3150 3700 0.0577  11.09  19.56 27.71 37.30 -24.9 14.9
17 4000 3700 4400 0.0577   9.33  16.78 25.41 34.41 -25.9 14.3
18 4800 4400 5300 0.0460   5.84  12.14 19.20 29.01 -24.2 12.4
19 5800 5300 6400 0.0343   3.47   9.04 15.37 25.17 -19.0  7.9
20 7000 6400 7700 0.0226   1.78   6.36 12.61 22.08 -11.7  4.3
21 8500 7700 9500 0.0110  -0.14   3.44  9.62 18.76  -6.0  0.5
 [1] "fi"     "li"     "hi"     "Ii"     "normal" "raised" "loud"   "shout" 
 [9] "Xi"     "Fi"    
 [1]  350  450  570  700  840 1000 1170 1370 1600 1850 2150 2500 2900 3400 4000
[16] 4800 5800
    fi Deltai   Ii normal raised  loud shout    Xi   Fi
1  250  22.48 0.06  34.75  38.98 41.55 42.50  -3.9  1.0
2  500  25.48 0.17  34.27  40.15 44.85 49.24  -9.7  1.8
3 1000  28.48 0.24  25.01  33.86 42.16 51.31 -12.5  2.6
4 2000  31.48 0.26  17.32  25.32 34.39 44.32 -17.7 12.0
5 4000  34.48 0.21   9.33  16.78 25.41 34.41 -25.9 14.3
6 8000  37.48 0.05   1.13   5.07 11.39 20.72  -7.1  1.8
normal raised   loud  shout 
 62.35  68.34  74.85  82.30 

SII documentation built on May 1, 2019, 8:48 p.m.