Technical Description of the Sound Booths
Sound-Attenuating Chambers:
- CATSS Booth 1: 10'x13', Single-Walled, Semi-Anechoic Room
- CATSS Booth 2: 7'x7', Double-Walled Booth
- CATSS Booth 3: 7'x7', Single-Walled Booth
CATSS Booth 1
10'x13', Single-Walled, Semi-Anechoic Room (Elliott S22)
ETS-Lindgren Acoustic Systems: Sound-Attenuating Chamber
- Interior Dimensions: 10' by 13' (Height ~8.5')
- 4-8 inches of acoustic foam covering the walls and ceiling to minimize reverberation.
- Electrically shielded for cleaner EEG recordings.
- Single-walled construction with approximately 40-50 dB attenuation of sound from outside the booth.
Overall Noise Floor Level: 17.2 dB(A)
Ambient Noise (Octave-Band) Measurements
(Booth door shut, projectors off.)
| 31.5 Hz | 43 dB SPL |
| 63 Hz | 29 dB SP |
| 125 Hz | 24 dB SPL |
| 250 Hz | 5 dB SPL |
| 500 Hz | 4 dB SPL |
| 1 kHz | 6 dB SPL |
| 2 kHz | 9 dB SPL |
| 4 kHz | 10 dB SPL |
| 8 kHz | 12 dB SP |
(Click here for noise floor values with the video projectors turned on.)
CATSS Booth 2
7'x7', Double-Walled Booth (S27 Elliott)
ETS-Lindgren Acoustic Systems: Sound-Attenuating Chamber
- Interior Dimensions: 7' by 7' (Height 6.5')
- Electrically shielded for cleaner EEG recordings.
- Double-walled construction with approximately 60-70 dB attenuation of sound from outside the booth.
Overall Noise Floor Level: 17.0 dB(A)
Ambient Noise (Octave-Band) Measurements
(Booth door shut.)
| 31.5 Hz | 43 dB SPL |
| 63 Hz | 25 dB SPL |
| 125 Hz | 13 dB SPL |
| 250 Hz | 3 dB SPL |
| 500 Hz | 4 dB SPL |
| 1 kHz | 6 dB SPL |
| 2 kHz | 8 dB SPL |
| 4 kHz | 10 dB SPL |
| 8 kHz | 12 dB SPL |
CATSS Booth 3
7'x7', Single-Walled Booth (S41 Elliott)
ETS-Lindgren Acoustic Systems: Sound-Attenuating Chamber
- Interior Dimensions: 7' by 7' (Height 6.5')
- Electrically shielded for cleaner EEG recordings.
- Single-walled construction with approximately 40-50 dB attenuation of sound from outside the booth.
Overall Noise Floor Level: 22.6 dB(A)
Ambient Noise (Octave-Band) Measurements
(Booth door shut.)
| 31.5 Hz | 45 dB SPL |
| 63 Hz | 38 dB SPL |
| 125 Hz | 35 dB SPL |
| 250 Hz | 19 dB SPL |
| 500 Hz | 6 dB SPL |
| 1 kHz | 7 dB SPL |
| 2 kHz | 9 dB SPL |
| 4 kHz | 11 dB SPL |
| 8 kHz | 12 dB SPL |
