Table 4.
Subject | Stimulus | Loudness | Annoyance | Acceptability |
---|---|---|---|---|
1 | Before | 50 | 70 | |
2-KHz-FM | 4 | 1 | 82 | |
Spa 1 | 0 | 0 | 98 | |
20% AM noise | 2 | 0 | 35 | |
Ocean | 5 | 4 | 24 | |
2 | Before | 90 | 80 | |
2-kHz-AM | 55 | 57 | 60 | |
Unmodulated noise | 52 | 48 | 71 | |
Ocean | 38 | 36 | 74 | |
3 | Before | 30 | 20 | |
1000-Hz-AM | 11 | 10 | 63 | |
OLSA unmodulated | 16 | 18 | 82 | |
Spa 4 | 13 | 15 | 92 | |
Ocean | 15 | 18 | 88 | |
4 | Before | 30 | 30 | |
Spa 1 | 20 | 19 | 73 | |
Spa 2 | 21 | 20 | 72 | |
OLSA modulated 20% | 21 | 20 | 68 | |
5 | Before | 40 | 10 | |
Musical Melody 4 | 28 | 5 | 60 | |
Spa 1 | 29 | 12 | 56 | |
Spa 3 | 33 | 9 | 8 | |
Ocean | 33 | 5 | 0 | |
6 | Before | 70 | 70 | |
2-kHz-AM | 75 | 69 | 60 | |
Ocean | 62 | 49 | 66 | |
7 | Before | 82 | 85 | |
Band-Filtered Noise 1 | 54 | 54 | 61 | |
Low-pass noise < 1000 Hz | 52 | 52 | 60 | |
Broadband noise | 54 | 56 | 58 |
Note. The rating refers to the situation before starting the trial and during the use of suppression sound (Subjects 2 and 7 are the same person). FM = frequency modulated; AM = amplitude modulated; OLSA = Oldenburg Sentence Test.