IEEE Consumer Electronics Magazine - January/February 2023 - 85

Table 1. PESQ Happy Emotion in Different
Environments.
PESQ score (emotion
happy)
Noise
Type
Airport
Car
Traffic
Train
Input SNR
(dB)
5
5
5
5
OMSS Paliwal4
2.237
2.543
3.318
3.381
2.179
2.501
2.334
2.613
Noisy
1.975 1.122
2.305 1.905
3.732 2.732
4.070 2.994
2.043 2.012
2.342 2.543
2.302 2.543
2.580 2.118
Classifier training and testing: In the experiment
presented in this article, GMM classifier is first
trained and tested five times. The results of human
stress of various emotion types with the noise
environment type are shown in Table 2. The performance
of the proposed OMSS is compared with
conventional Paliwal's4 method and noisy unprocessed
speech at input SNR of 0 and 5 dB for various
noise types (car, airport, traffic, and train) and
speech emotion (neutral, anger, joy, sad, and fear).
Case 1-Speech corrupted by airport noise:
Speech Emotion Recognition Classification
Results
The speech stimuli generated in the section
" Database Used, Stimuli Generation, and performance "
are used for a speech emotion recognition
classification.
The confusion matrix for airport noise case is
presented in Table 2. The best recognized emotion
for the proposed OMSS in this case is anger
(98.5%), which is the mostly confused with
happy speech. The worst recognized emotion is
neutral with rate of 26.5%. Fear is the most often
confused with sad and joy emotions of noisy
speech stimuli.
Case 2-Speech corrupted by carnoise: It is clear
that speech recognition rates were degraded in
noisy environment for different SNR levels. We
have found that speech recognition rates have
been improved in noisy conditions under anger
Table 2. Confusion Matrix Results for Different Methods in Case 1 Airport Noise.
Emotion Recognized in %
Type of stimuli
Neutral
Noisy
OMSS
Paliwal's
Noisy
Anger
OMSS
Paliwal's
Noisy
Joy
OMSS
Paliwal's
Noisy
Sad
OMSS
Paliwal's
Noisy
Fear
OMSS
Paliwal's
Neutral
11.5
26.5
10.5
4.5
16.5
6.3
26.5
6.0
8.5
Anger
39.0
23.5
14.2
50.5
98.5
24.5
25.4
26.5
5.5
10.5
Joy
49.5
25
75.3
22.5
1.5
75.5
43.6
73.5
94.5
42.5
71.5
56.5
Sad
20
11.5
14.5
7.5
42.5
18.5
37.0
45.5
49
Fear
5
11
43.7
31.0
6.5
48.5
42.5
January/February 2023
85

IEEE Consumer Electronics Magazine - January/February 2023

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