Measurement and Analysis of Relevant Room Acoustic Parameters in Speech and Language Therapy Rooms and Evaluation of Their Influence on Objective Voice Quality Metrics

Publications

Measured Impulse Responses

The audio files contain three consecutive, level-matched impulse responses of the measured therapy rooms, with the following assignment:

Inst. 01: Room 01, Room 02, Room 03, Room 04, Room 05, Room 06, Room 07
Inst. 02: Room 01, Room 02, Room 03, Room 04, Room 05, Room 06, Room 07, Room 08
Inst. 03: Room 01, Room 02, Room 03, Room 04
Inst. 04: Room 01, Room 02
Inst. 05: Room 01, Room 02, Room 03
Inst. 06: Room 01, Room 02, Room 03, Room 04, Room 05
Inst. 07: Room 01, Room 02, Room 03
Inst. 08: Room 01, Room 02, Room 03

Recorded Noise Files

The audio files contain 30 seconds of recorded background noise from the examined therapy rooms, with the following assignment:

The last 5 characters of the file name correspond to the level offset to convert the noise from dB FS to dB SPL, where 80p01 represents a gain of 80.01 dB.

Inst. 01: Room 01, Room 02, Room 03, Room 04, Room 05, Room 06, Room 07
Inst. 02: Room 01, Room 02, Room 03, Room 04, Room 05, Room 06, Room 07, Room 08
Inst. 03: Room 01, Room 02, Room 03, Room 04
Inst. 04: Room 01, Room 02
Inst. 05: Room 01, Room 02, Room 03
Inst. 06: Room 01, Room 02, Room 03, Room 04, Room 05
Inst. 07: Room 01, Room 02, Room 03
Inst. 08: Room 01, Room 02, Room 03

Measured reverberation times in 35 speech and language therapy rooms

Reverberation times \(\tau_{60}\) in 23 third-octave bands from \(f_{m_1} = 63\text{ Hz}\) to \(f_{m_{23}} = 8\text{ kHz}\) of room acoustic measurements in speech and language therapy rooms, broken down by institution and room number. Reverberation times that fall within the tolerance corridors for rooms with a volume of \(V = 30 \text{ to } 80 \text{ m}^3\) in usage group A3 and usage group A4 according to DIN 18041:2016-03 are highlighted in color.

Institution Room 63 Hz 80 Hz 100 Hz 125 Hz 160 Hz 200 Hz 250 Hz 315 Hz 400 Hz 500 Hz 630 Hz 800 Hz 1000 Hz 1250 Hz 1600 Hz 2000 Hz 2500 Hz 3150 Hz 4000 Hz 5000 Hz 8000 Hz
1 1 0.59 0.63 0.60 0.77 0.65 0.63 0.83 0.64 0.60 0.65 0.67 0.57 0.58 0.58 0.55 0.56 0.51 0.53 0.44 0.38 0.24
  2 0.31 0.37 0.25 0.36 0.27 0.35 0.29 0.23 0.36 0.28 0.29 0.31 0.27 0.29 0.25 0.27 0.24 0.24 0.26 0.24 0.17
  3 0.43 0.46 0.58 0.47 0.66 0.78 0.58 0.58 0.61 0.63 0.59 0.57 0.52 0.58 0.53 0.51 0.46 0.45 0.39 0.37 0.20
  4 0.61 0.59 0.61 0.82 0.74 0.83 0.83 0.75 0.75 0.83 0.75 0.73 0.64 0.64 0.57 0.56 0.49 0.49 0.48 0.41 0.24
  5 0.66 0.76 0.68 0.62 0.85 0.84 0.90 0.88 0.74 0.78 0.74 0.73 0.64 0.65 0.55 0.52 0.53 0.46 0.45 0.40 0.22
  6 0.43 0.33 0.83 0.85 0.76 0.69 0.61 0.63 0.60 0.60 0.64 0.62 0.51 0.64 0.52 0.50 0.46 0.44 0.42 0.36 0.20
  7 0.41 0.44 0.40 0.56 0.45 0.42 0.69 0.63 0.53 0.52 0.52 0.45 0.47 0.53 0.45 0.42 0.41 0.36 0.33 0.30 0.21
2 1 0.24 0.31 0.32 0.34 0.29 0.27 0.30 0.27 0.21 0.27 0.24 0.21 0.22 0.22 0.22 0.25 0.24 0.20 0.18 0.18 0.16
  2 0.25 0.20 0.24 0.25 0.17 0.27 0.25 0.23 0.19 0.21 0.16 0.16 0.18 0.29 0.19 0.22 0.21 0.20 0.16 0.15 0.13
  3 0.16 0.28 0.26 0.23 0.21 0.18 0.22 0.23 0.23 0.24 0.27 0.20 0.18 0.22 0.20 0.20 0.20 0.20 0.18 0.19 0.14
  4 0.36 0.43 0.47 0.57 0.44 0.51 0.39 0.45 0.39 0.46 0.38 0.41 0.39 0.37 0.35 0.35 0.35 0.35 0.35 0.34 0.21
  5 0.40 0.37 0.41 0.54 0.57 0.46 0.46 0.61 0.59 0.68 0.64 0.67 0.66 0.61 0.58 0.57 0.59 0.61 0.63 0.57 0.32
  6 0.39 0.53 0.31 0.19 0.42 0.50 0.36 0.35 0.50 0.49 0.46 0.45 0.52 0.50 0.48 0.47 0.45 0.47 0.47 0.43 0.24
  7 0.28 0.39 0.45 0.48 0.48 0.60 0.47 0.47 0.50 0.58 0.50 0.54 0.53 0.47 0.50 0.53 0.51 0.50 0.50 0.49 0.28
  8 0.47 0.41 0.29 0.62 0.38 0.45 0.38 0.46 0.52 0.50 0.49 0.43 0.49 0.48 0.44 0.45 0.44 0.40 0.38 0.38 0.23
3 1 0.59 0.53 0.37 0.47 0.45 0.41 0.49 0.52 0.57 0.59 0.46 0.46 0.46 0.49 0.46 0.43 0.37 0.33 0.32 0.32 0.20
  2 0.28 0.45 0.35 0.31 0.48 0.43 0.55 0.44 0.44 0.42 0.42 0.43 0.42 0.38 0.43 0.44 0.42 0.43 0.39 0.39 0.23
  3 0.44 0.36 0.43 0.46 0.49 0.49 0.48 0.51 0.53 0.48 0.46 0.42 0.48 0.44 0.48 0.47 0.48 0.47 0.46 0.43 0.25
  4 0.37 0.52 0.43 0.58 0.59 0.48 0.62 0.64 0.65 0.59 0.61 0.60 0.64 0.57 0.64 0.63 0.59 0.57 0.56 0.49 0.30
4 1 0.29 0.38 0.35 0.29 0.36 0.27 0.28 0.31 0.32 0.24 0.25 0.26 0.28 0.34 0.24 0.30 0.32 0.34 0.34 0.33 0.19
  2 0.34 0.38 0.39 0.20 0.27 0.22 0.24 0.20 0.17 0.17 0.23 0.22 0.28 0.33 0.25 0.27 0.25 0.27 0.31 0.31 **0.18
5 1 1.37 1.93 1.68 1.96 1.56 1.31 1.52 1.29 1.40 1.43 1.34 1.35 1.30 1.27 1.25 1.23 1.18 1.11 0.88 0.78 **0.33
  2 0.41 0.42 0.58 0.56 0.60 0.75 0.62 0.69 0.67 0.65 0.67 0.74 0.71 0.75 0.70 0.60 0.66 0.65 0.64 0.56 **0.26
  3 0.72 0.34 0.64 0.63 0.66 0.77 0.70 0.70 0.84 0.74 0.81 0.82 0.85 0.79 0.76 0.77 0.70 0.69 0.66 0.57 **0.25
6 1 0.54 0.42 0.38 0.45 0.45 0.38 0.47 0.38 0.27 0.32 0.27 0.29 0.35 0.40 0.34 0.34 0.35 0.34 0.35 0.33 **0.23
  2 0.48 0.38 0.35 0.29 0.44 0.42 0.45 0.34 0.30 0.27 0.28 0.28 0.30 0.33 0.33 0.34 0.36 0.34 0.30 0.34 **0.23
  3 0.40 0.29 0.33 0.26 0.43 0.31 0.30 0.27 0.28 0.29 0.28 0.33 0.28 0.29 0.25 0.26 0.28 0.28 0.30 0.30 **0.21
  4 0.36 0.29 0.24 0.23 0.31 0.30 0.34 0.29 0.29 0.27 0.25 0.27 0.25 0.24 0.28 0.32 0.32 0.35 0.35 0.33 **0.21
  5 0.40 0.30 0.32 0.21 0.39 0.35 0.40 0.37 0.44 0.39 0.38 0.36 0.30 0.30 0.28 0.31 0.33 0.32 0.35 0.34 **0.21
7 1 0.43 0.28 0.36 0.32 0.26 0.18 0.11 0.30 0.14 0.09 0.08 0.10 0.08 0.35 0.13 0.14 0.05 0.06 0.07 0.05 0.06
  2 0.28 0.36 0.34 0.24 0.21 0.26 0.13 0.19 0.13 0.09 0.10 0.13 0.13 0.13 0.12 0.15 0.09 0.10 0.10 0.08 0.10
  3 0.34 0.26 0.28 0.15 0.19 0.16 0.15 0.15 0.08 0.11 0.11 0.11 0.10 0.19 0.15 0.13 0.09 0.08 0.08 0.07 0.08
8 1 0.28 0.34 0.29 0.23 0.29 0.26 0.29 0.36 0.27 0.21 0.28 0.26 0.30 0.42 0.31 0.29 0.30 0.26 0.30 0.30 **0.25
  2 0.31 0.39 0.29 0.26 0.31 0.50 0.27 0.44 0.36 0.22 0.24 0.26 0.27 0.31 0.34 0.35 0.34 0.36 0.36 0.37 **0.22
  3 0.24 0.18 0.28 0.17 0.24 0.21 0.20 0.21 0.21 0.24 0.14 0.16 0.14 0.23 0.16 0.16 0.17 0.17 0.18 0.19 0.15

Measured reverberation times in 35 speech and language therapy rooms

Evaluation metrics BIC, \(R^2\), and RMSE for various statistical linear mixed-effects models based on twelve objective vocal quality measures using recordings captured with lavalier (left) and smartphone (right) microphones. For BIC, the two best values per column (or more, in the case of ties) are highlighted; for \(R^2\) and RMSE, the three best overall values (or more, in the case of ties) are emphasized.
BIC results for lavallier BIC results for smartphone microphone
R2</span> results for lavallier microphone R2</span> results for smartphone microphone
RMSE results for lavallier microphone RMSE results for smartphone microphone