Citations
| 102 |
A physical method for measuring speech transmission quality
- Steeneken
(Show Context)
Citation Context ... 2 + 476.8 STI - 0.009. (1) STI was calculated from the A-weighted speech-to-noiseslevel difference (SNA) and the 1-kHz early-decay times(EDT1) using the procedure described by Steeneken andsHoutgast =-=[7]-=-. At any position r, SNA can be determined 0 0 Canadian Acoustics / Acoustique canadienne Vol. 33 No. 4 (2005) - 6 from values of the A-weighted speech level (SLA(r)) and thesbackground-noise level (B... |
| 13 |
Reverberation time and maximum background-noise level for classrooms from a comparative study of speech intelligibility metrics.
- Bistafa, Bradley
- 2000
(Show Context)
Citation Context ...eech-to-noise level difference shouldsexceed a value of at least 15 dB. Given typical instructorsspeech levels, it is considered that classroom background-snoise levels should not exceed about 35 dBA =-=[1, 2]-=-. The objective of the present research was to study, usingspreviously developed empirical prediction models [3, 4, 5],sthe relationship between verbal-communication quality andsclassroom design, and ... |
| 8 |
Measurement and prediction of typical speech and background noise levels in university classrooms during lectures,”
- Hodgson, Rempel, et al.
- 1999
(Show Context)
Citation Context ...is considered that classroom background-snoise levels should not exceed about 35 dBA [1, 2]. The objective of the present research was to study, usingspreviously developed empirical prediction models =-=[3, 4, 5]-=-,sthe relationship between verbal-communication quality andsclassroom design, and thus to identify the optimal designs.sThis was done by predicting the variations of measuressrelated to classroom verb... |
| 8 |
Experimental investigation of the acoustical characteristics of university classrooms,”
- Hodgson
- 1999
(Show Context)
Citation Context ...typical of UBC classrooms, using diffuse-fieldstheory: f * \1 SLAo (r) = SLAu (r) + 10log- 4mr 4 A (8) 4m - 4 A o in which Ao = Au + 0.7nAp is the occupied-classroomsabsorption, in m2, and Ap=0.81 m2 =-=[8]-=-. As for EDT1u, values were predicted using diffuse-fieldsreverberation theory and the total 1-kHz surface absorptionscoefficient a l tot, as follows [4]: EDTu = 0.16 V / (a1tot S + 4mV), (9a) with a1... |
| 4 |
Classroom Acoustics: a resource for creating learning environments with desirable listening conditions
- Coffeen, Seep, et al.
- 2000
(Show Context)
Citation Context ...eech-to-noise level difference shouldsexceed a value of at least 15 dB. Given typical instructorsspeech levels, it is considered that classroom background-snoise levels should not exceed about 35 dBA =-=[1, 2]-=-. The objective of the present research was to study, usingspreviously developed empirical prediction models [3, 4, 5],sthe relationship between verbal-communication quality andsclassroom design, and ... |
| 4 |
Rating, ranking and understanding acoustical quality in nedy et al.: Student perceptions of classroom listening environments university classrooms,”
- Hodgson
- 2002
(Show Context)
Citation Context ...is considered that classroom background-snoise levels should not exceed about 35 dBA [1, 2]. The objective of the present research was to study, usingspreviously developed empirical prediction models =-=[3, 4, 5]-=-,sthe relationship between verbal-communication quality andsclassroom design, and thus to identify the optimal designs.sThis was done by predicting the variations of measuressrelated to classroom verb... |
| 2 |
Empirical prediction of speech levels and reverberation in classrooms,”
- Hodgson
- 2001
(Show Context)
Citation Context ...is considered that classroom background-snoise levels should not exceed about 35 dBA [1, 2]. The objective of the present research was to study, usingspreviously developed empirical prediction models =-=[3, 4, 5]-=-,sthe relationship between verbal-communication quality andsclassroom design, and thus to identify the optimal designs.sThis was done by predicting the variations of measuressrelated to classroom verb... |
| 1 |
The common intelligibility scale
- Barnett, Knight
- 1995
(Show Context)
Citation Context ...tally. 2. STI / SI PREDICTION Speech intelligibility SI was calculated from STI using asregression equation fitted to pairs of corresponding STI ands‘short-sentence’ SI values from Barnett and Knight =-=[6]-=-: SI = -270.9 ST I4 + 817.4 ST I3 - 923.3 STI 2 + 476.8 STI - 0.009. (1) STI was calculated from the A-weighted speech-to-noiseslevel difference (SNA) and the 1-kHz early-decay times(EDT1) using the p... |
| 1 |
Prediction of speech intelligibility in rooms - a comparison of five methods
- Hodgson
- 2004
(Show Context)
Citation Context ... that more accurately account for details of thesreverberation, and in not using frequency-varying values.sHowever, it has been shown to give very similar predictionssto those by more accurate models =-=[9]-=-. 3. VARIATION OF VERBALCOMMUNICATION QUALITY WITHsDESIGN PARAMETERS Let us consider how verbal-communication quality variesswith the design parameters. As an example, Table 1 showssthe variation of r... |
