Professor NG, Manwa Lawrence

Teaching Areas:

Laryngectomy, Speech Science, Speech Acoustics, Anatomy and  Physiology of Speech and Hearing Mechanism, Research Methodology

Research Interests:

Laryngectomy, Speech Instrumentation, Voice Disorders, Accent Identification, Quantification and Modification, Neuromodulation for Speech Deficits

Active Grants

1. 32022/06/30-2024/06/29, Seed Funding Programme for Basic Research, University of Hong Kong (202111159064) (PI). “The Application of Artificial Intelligence and Deep Learning in Automatic Assessment of Disordered Voices”, HKD$82,000.00.
2. 2021/03/22 - 2022/08/31. Education Faculty Research Fund, University of Hong Kong (000250337/24113/10000/100/01) (PI). “How does L1 affect l2 pronunciation? A large-scale quantitative comparison of error patterns associated with L2 English produced by native Mandarin and Cantonese adult ESL speakers”, $147,770.00.
3. 2020/11/16 - 2021/11/15, Research Integrity Funding Scheme 2020/21, University of Hong Kong (102009994/024113/10000/302/01) (PI). “Developing a Self-Learning Package on Research Integrity”, HKD$49,620.
4. 2020/07/01 - 2022/08/31. Education Faculty Research Fund, University of Hong Kong (000250337/024113/10000/100/01) (PI). “Effect of Gender, Age and Bolus Viscosity on Acoustics of Normal Swallow”, HKD$46,230.

Refereed Journal Articles (since 2016)

1. Shen, C., Wang, D., Wang, Z., Zhang, H., He, Y., Zhang, Y., Ng, M. L., Xu, J., Pan, Y., Chen, Y., Wang, L., & Yan, N. (in submission). FF-ASDNET: An ASD detection model using deep representation learning and multi-scale fusion on eye track data from ecological emotion perception task. Knowledge-Based Systems.
2. Au, Y. C., Yan, N., & Ng, M. L. (in submission). Automatic assessment of voice quality using Artificial Intelligence. Larynogscope.
3. Au, Y. C., & Ng, M. (in submission). Developing a smart system for identifying disordered voices by using machine learning. Journal of Voice.
4. Zhu, S., Leung, N., Chen, Y., Tong, E. T.-S., & Ng, M. (in submission). Vowel production associated with Cantonese speakers of Parkinson’s disease. International Journal of Language & Communication Disorders.
5. Jiang, F., Chen, Y., & Ng, M. (in submission). Impact of face mask wearing on speech production. International Journal of Speech-Language Pathology.
6. Liu, J., Ruzi, R., Jian, C., Wang, Q., Zhao, S., Ng, M., Zhao, S., Wang, L., & Yan, N. (in submission). Mapping subcortical brain lesions, behavioral and acoustic analysis for early assessment of subacute stroke patients with dysarthria. Frontiers in Neuroscience -Auditory Cognitive Neuroscience.
7. Liu, X., Du, X., Liu, J., Su, R., Ng, M., Zhang, Y., Yang, Y., Zhao, S., Wang, L., & Yan, N. (in submission). Automatic assessment of dysarthria using audio-visual vowel graph attention network. IEEE Transactions on Audio, Speech and Language Processing.
8. Song, X., Chen, Y., & Ng, M. (in revision). Vocal fold vibration associated with inspiratory phonation – An acoustic and electroglottographic study. Journal of Voice.
9. 彭静、吴民华、邹密、杨硕、谭洁（2024）。不同年龄阶段功能性语音障碍儿童的辅音语音错误特征研究。听力学与言语疾病杂志, 32(5), 417-421。
   Peng, J., Ng, M., Zou, M., Yang, S., & Tan, J. (2024). A study on the characteristics of consonant phonetic errors in children with functional articulation disorders at different ages. Journal of Audiology and Speech-Language Pathology, 32(5), 417-421.
   doi: 10.3969/j.issn.1006-7299.2024.05.007
10. Xiong, M., Ng, N., Siu, B., & Ng, M. (2024). Relationship between IDDSI Flow Test and consistometric measures for consistency classification – An examination of thickened liquids prepared using starch-based and xanthan gum-based thickening agents. Folia Phoniatrica et Logopaedica.
    doi: 10.1159/000540118
11. Zou, M., Peng, J., Ng, M. L., Tan, J., & Xiang, J. (2024). Nonsurgical treatment of bilateral vocal fold paralysis – A case study of voice training combined with acupuncture therapy. Acupuncture in Medicine, 1-3.
    doi: 10.1177/09645284241265869
12. Jiang, F., Ng, M., Song, Y., & Chen, Y. (2024). Effect of face masks on voice quality associated with young and older Chinese adult speakers. Journal of Voice.
    doi: 10.1016/j.jvoice.2024.04.025
13. Wang, T., Xu, X., Xie, X., & Ng, M. L. (2023). Probing lexical ambiguity in Chinese characters via their word formations: Convergence of perceived and computed metrics on quantity and relatedness of character senses. Cognitive Science, 47, e13379.
    doi: 10.1111/cogs.13379
14. Cox, S. R., Huang, T., Chen, W.-R., & Ng, M. L. (2023). An acoustic study of Cantonese alaryngeal speech in different speaking conditions. Journal of the Acoustical Society of America, 153(5), 2973-2984.
    doi: 10.1121/10.0019471
15. Wang, D., Zhang, Y., Zhang, H., Huo, F., Zhang, L., Yang, Y., Wang, L., Yan, Y., Ng, M., & Yan, N. (2023). Is visual gaze in children with autism spectrum disorder related to sequence of emotion intensity presentation? An eye-tracking study of natural emotion perception processes. Autism Research, 16(5), 1024-1039.
    doi: 10.1002/aur.2918
16. Liu, J., Du, X., Lu, S., Zhang, Y., Hu, A., Ng, M., Su, R., Wang, L., & Yan, N. (2023). Audio-video database from subacute stroke patients for dysarthric speech intelligence assessment and preliminary analysis. Biomedical Signal Processing and Control, 79, Part 2, 104161.
    doi: 10.1016/j.bspc.2022.104161
17. Wong, M. N., Baig, F. N., Chan, Y. K., Ng, M., & Zhu, F. F. (2022). Transcranial direct current stimulation over the primary motor cortex improves speech production in post-stroke dysarthric speakers: A pilot study. PLoS One, 17(10), e0275779.
    doi: 10.1371/journal.pone.0275779
18. Zhu, S., Chong, S., Chen, Y., Wang, T., & Ng, M. (2022). Effect of language on voice quality - An acoustic study of bilingual speakers of Mandarin Chinese and English. Folia Phoniatrica et Logopaedica, 74(6), 421-430.
    doi: 10.1159/000525649
19. Ng, M., Mak, C., Mak, J., & Xiong, M. (2022). Effect of temperature on consistency of starch- and gum-based thickened liquids for dysphagic individuals. Food Hydrocolloids for Health, 2, 1-7.
    doi: 10.1016/j.fhfh.2022.100076
20. Chan, H. F., Ng, M., Kim, H., & Kim, D. Y. (2022). Swallowing-related quality of life among oral-feeding Chinese patients of Parkinson’s Disease - A preliminary study using Chinese SWAL-QOL. Disability and Rehabilitation, 44(7), 1077-1083.
    doi: 1080/09638288.2020.1791979
21. Ng, M. & Lui, H. Y. (2022). Rice congee as an alternative to thickened liquids for patients with swallowing disorders. Journal of Textual Studies, 53(3), 405-416.
    doi: 10.111/JTXS.12673
22. Ng, M., & Ki, A. (2022). Acoustic characteristics associated with liquid swallowing sounds of different bolus consistencies in young healthy adults. International Journal of Language & Communication Disorders, 57, 552-564.
    doi: 10.1111/1460-6984.12706
23. Hui, T. F., Cox, S. R., Huang, T., Chen, W.-R., & Ng, M. (2021). The effect of clear speech on Cantonese alaryngeal speakers’ intelligibility. Folia Phoniatrica et Logopaedica, 74(2), 103-111.
    doi: 10.1159/000517676
24. Wong, L. Y., Ng, M., & Tong, E. T. S. (2021). How accurate are the consistency labels used in Hong Kong? An objective study of consistency of thickened liquids using IDDSI and consistometric measurements. Folia Phoniatrica et Logopaedica, 74(3), 167-175.
    doi: 10.1159/000518480
25. Ng, M., & Woo, H. K. (2021). Effect of total laryngectomy on vowel production - An acoustic study of vowels produced by alaryngeal speakers of Cantonese. International Journal of Speech-Language Pathology, 23(6), 652-661.
    doi: 10.1080/17549507.2021.1876166
26. Wang, T., Hong, Y., Wang, Q., Su, R., Ng, M., Xu, J., Wang, L., & Yan, N. (2021). Identification of mild cognitive impairment among Chinese based on multiple spoken tasks. Journal of Alzheimer’s Disease, 82(1), 185-204.
    doi: 10.3233/JAD-201387
27. Chan, H. F., Ng, M., Rosen, C., & Schneider, S. L. (2021). Cultural adaptation and validation of Speech Handicap Index (SHI): A scoping review. American Journal of Speech-Language Pathology, 30(2), 748-760.
    doi: 10.1044/2020_AJSLP-20-00236
28. Ng, M. (2021). The use of the Lombard effect in improving alaryngeal speech. Journal of Voice, 35(1), 18-28.
    doi: 10.1016/j.jvoice.20107.007
29. Wang, Z., Yao, L., Ng, M. L., Chen, Y., & Zhang, W. (2020). Acoustic analysis of Mandarin Chinese vowels produced by young adults. Rehabilitation Medicine, 30(3), 183-191.
    王臻旎、陈旸、吴民华、姚立群、张伟明（2020）。成人普通话元音的声学分析。康复学报，第30卷，第3期，183-191页。
    doi: 10.3724/SP.J.1329.2020.03004
30. He, Y., Qi, S., Wang, L., He, W., Tan, C., Zhang, H., Chen, Y., Ng, M., & Yan, N. (2019). The characteristics of intelligence profile and eye gaze in facial emotion recognition in mild and moderate preschoolers with Autism Spectrum Disorder. Frontiers in Psychiatry, 10, 402.
    doi: 10.3389/fpsyt.2019.00402
31. Zhang, H., Su, I-F., Chen, F., Ng, M., Wang, L., & Yan, N. (2019). The time course of orthographic and semantic activation in Chinese character recognition: Evidence from ERP study. Language, Cognition and Neuroscience, 35(3), 292-309.
    doi: 10.1080/23273798.2019.1652762
32. Ng, M., & Tsang, G. (2019). The Lombard effect associated with Chinese male alaryngeal speech. International Journal of Speech-Language Pathology, 21(6), 584-592.
    doi: 10.1080/17549502018.1551932
33. Ng, M., Tong, E. T.-S., & Yu, K. K. M. (2019). Articulatory contact pressure during bilabial plosive production in esophageal and tracheoesophageal speech. Folia Phoniatrica et Logopaedica, 71(1), 1-6.
    doi: 10.1159/000493344
34. Wong, M. N., Chan, Y., Ng, M., & Zhu, F. F. (2018). Effects of transcranial direct current stimulation over the Broca's area on tongue twister production. Internationa Journal of Speech-Language Pathology, 1-7.
    doi: 10.1080/17549507.2017.1417480
35. Ng, M., Yan, N, Chan, V., & Chen, Y., & Lam, P. K. Y. (2018). A volumetric analysis of vocal tract associated with laryngectomees by using acoustic reflection technology. Folia Phoniatrica et Logopaedica, 70, 44-49.
    doi: 10.1159/000486714
36. Ng, M. & Wong, B. Y. H. (2017). Voice performance in tonal language speakers with glottal insufficiency due to unilateral vocal fold paralysis after injection laryngoplasty: a multidimensional study of Cantonese patients. Hong Kong Medical Journal, 24 (suppl. 2), S42-S44.
37. Ng, M., Yan, N., Chiu, K. N., & Chen, Y. (2017). Acoustic and electroglottographic characteristics associated with tracheoesophageal speech of Cantonese. Rehabilitation Medicine, 27(5), 5-11.
    吴民华、燕楠、赵嘉丽、陈暘（2017）。粤语中食气管语的声学与电声门特性。康复学报，第27卷，第5期，5-11页。
    doi: 10.3724/SP.J.1329.2017.05000
38. Ng, M., & Lau, D. (2017). A perceptual and acoustic study of voice gender in prepubertal children. Speech, Language and Hearing, 20(3), 123-129.
    doi: 10.1080/2050571X.2016.1253534
39. Wong, M. N., Kuruvilla, M., & Ng, M. (2017). Differential effects of increased loudness on tongue kinematics in individuals with PD? Analyses of two cases. Speech, Language, and Hearing, 20(1), 49-56.
    doi: 10.1080/2050571X.2016.1206694
40. Li, X., To, C. K. S., & Ng, M. (2017). Effects of L1 tone on perception of L2 tone - a study of Mandarin tone learning by native Cantonese children. Bilingualism: Language and Cognition, 20(3), 549-560.
    doi: 10.1017/S1366728916000195
41. Ng, M. L., Chen, Y., & Wong, S. (2016). Lingual movement during speech production by a speaker of Cantonese with dysarthria - An electromagnetic articulographic study. Rehabilitation Medicine, 26(5), 8-16, 24.
    吴民华、陈暘、王芷琪（2016）。电磁构音图谱仪对神经控制异常性构音障碍粤语患者说话时舌头运动的研究。康复学报，第26卷，第5期，8-16, 24页。
    doi: 10.3724/SP.J.1329.20105008
42. Jiang, C., McPherson, B., & Ng, M. (2016). Voice onset time of alveolar stop /t/ and realization of unaspirated affricates associated with Mandarin-speaking children with repaired cleft palate. International Journal of Pediatric Otorhinolaryngology, 86, 150-155.
    doi: 10.1016/j.ijporl.2016.03.042
43. Wong, B. Y.-H., Yu, S.-Y., Ho, W.-K., Wei, W. I., & Ng, M. (2016). Injection laryngoplasty using hyaluronic acid for Chinese patients with unilateral vocal fold paralysis. Speech, Language and Hearing, 19(3), 153-160.
    doi: 10.1080/2050571X.2016.1159407
44. Jiang, C., Whitehill, T. L., McPherson, B., & Ng, M. (2016). Spectral moment analysis of affricates produced by Putonghua-speaking pre-adolescents with repaired cleft palate. International Journal of Pediatric Otorhinolaryngology, 84, 137-142.
    doi: 10.1016/j.ijporl.2016.01.029
45. Yu, S., Lee, T., & Ng, M. (2016). Surface electromyographic activity of extrinsic laryngeal muscles in Cantonese tone production. Journal of Signal Processing Systems, 82(2), 287-294.
    doi: 1007/s11265-015-1022-4
46. Wang, Z., Yu, P., Yan, N., Wang, L., & Ng, M. (2016). Automatic assessment of pathological voice quality using multidimensional acoustic analysis based on the GRBAS scale. Journal of Signal Processing Systems for Signal Image and Video Technology, 82(2), 241-251.
    doi: 10.1007/s11265-015-1016-2

Book Chapters

1. 吴民华（印制中）。声乐，在《艺术类损伤学》。北京，人民卫生出版社。
   Ng, M. (in press). SInging. In Traumatology of Dancing, Singing, and Music Playing. Beijing, China: People's Medical Publishing House Co. Ltd.
2. Zhang, H., Chen, F., Yan, N., Wang, L., Su, I. F., Ng, M. L. (2016). The interaction of semantic and orthographic processing during Chinese sinograms recognition: An ERP study. In M. Dong, J. Lin, X. Tang (eds.), Workshop on Chinese Lexical Semantics (pp. 717 - 727). Springer, Cham.
   doi: 10.1007/978-3-319-49508-8_66
3. Chan, L. K., Bridges, S. M., Doherty, I., Ng, M., Jin, J., Sharma, N., Chan, N. K., & Lai, Y. Y. H. (2016). How do students use mobile devices in problem-based learning? In S. Bridges, L. K. Chan, & C. E. Hmelo-Silver (Eds.), Educational technologies in contextual learning: Research in health professions education (pp. 99-116). New York, NY: Springer. 
   doi: 10.1007/978-3-319-08275-2_6

Articles in Conference Proceedings (since 2016)

1. Yang, Y., Su, R., Ruizi, R., Ng, M., Yan, N., & Wang, L. (2024). Optical flow guided tongue trajectory consistency for diffusion-based acoustic to articulatory inversion. Proceedings of the 25th Annual Conference of the International Speech Communication Association (Interspeech 2024), 417-421.
   doi: 10.21437/Interspeech.2024-1864
2. Lian, C., Wang, T., Gu, M., Ng, M. L., Zhu, F., Wang, L., & Yan, N. (2020). Does lexical retrieval deteriorate in patients with mild cognitive impairment? Analysis of brain functional network will tell. In Proceedings of the 21st Annual Conference of the International Speech Communication Association (Interspeech 2020), 111-115. 
   doi: 10.21437/Interspeech.2020-2490
3. Wang, T., Lian, C., Pan, J., Yan, Q., Zhu, F., Ng, M., Wang, L., & Yan, N. (2019, September). Towards the speech features of mild cognitive impairment: Universal evidence from structured and unstructured connected speech of Chinese. In Proceedings of the 20th Annual Conference of the International Speech Communication Association (Interspeech 2019), 3880-3884.
   doi: 10.21437/Interspeech.2019-2414
4. Wang, T., Liu, H., Wang, L., Ng, M., Li, H., & Yan, N. (2018, November). Effect of temporal lobe epilepsy on auditory-motor integration for vocal pitch regulation: Evidence from brain functional network analysis. In Proceedings of the 2019 Engineering in Medicine and Biology - Biomedical Engineering Ranging from Wellness to Intensive Care Medicine (EMBC’19), 1282-1288.
   doi: 10.1109/EMBC.2019.8856902
5. Leung, N., Tong, E., & Ng, M. (2018, October). Vowel characteristics associated with Parkinson’s disease in Cantonese. In Movement Disorders, 33, S756-S757, Hong Kong, China.
   doi: 10.1002/mds.116
6. Tong, E. T. S. & Ng, M. (2018, October). Effects of expiratory muscle strength training and voice therapy on Parkinsonian speech. In Movement Disorders, 33(2), S179-S180, Hong Kong, China.
   doi: 10.1002/mds.116
7. Chan, H. F. K., Kim, H., Ng, M., & Kim, D.-Y. (2018, October). Application of Chinese version of SWAL-QOL in Parkinson’s Disease. In Movement Disorders, 33(2), S482-S483, Hong Kong, China.
   doi: 10.1002/mds.116
8. Ng, M., Xiong, M., & Yan, N. (2018). Production of Cantonese tones using an ingressive airflow. In Proceedings of the 2018 International Conference on Asian Language Processing (IALP 2018), Bandung, Indonesia.
9. Zhang, W., Gui, X., Wang, T., Ng, M., Yang, F., Wang, L., &Yan, N. (2018). Acoustic features associated with sustained vowel and continuous speech productions by Chinese children with functional articulation disorders. In Proceedings of Interspeech 2018 (pp. 1696-1700).
   doi: 10.21437/Interspeech.2018-1521
10. Zhang, H., Yan, M., Wang, L., & Ng, M. (2017). Energy distribution analysis and nonlinear dynamical analysis of phonation in patients with Parkinson’s disease. In Proceedings of 2017 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 630-635.
    doi: 10.1109/APSIPA.2017.8282102
11. Lai, W. W. S., & Ng, M. L. (2017). Perception-production link in English lexical stress acquisition among Hong Kong Cantonese learners of English. In Stem-, Spraak-en Taalpathologie, 22 (Suppl.): 59.
12. Chang, R. K., & Ng, M. (2017). Differences in speech motor control between bilingual and monolingual speakers - an acoustic study. In Journal of the Acoustical Society of America, 141.5, 3819-3819.
    doi: 10.1121/1.4988463
13. Tong, E. T. S., Ng, M., & Yan, N. (2016). Impact of Expiratory Muscle Strength Training (EMST) on phonatory performance in Parkinson’s patients. In Movement Disorders, 31(S2), S1-S697.
    doi: 10.1002/mds.26688
14. Tong, E. T. S., Ng, M., & Yan, N. (2016). Dopaminergic medication effect on speech in Parkinson’s disease: A kinematic study. In Movement Disorders, 31(S2), S1-S697.
    doi: 10.1002/mds.26688
15. Xie, S., Yan, N., Yu, P, Ng, M. L., Wang, L., & Ji, Z. (2016). Deep neural networks for voice quality assessment based on the GRBAS scale. In Proceedings of the Interspeech 2016 (pp. 2656-2660), San Francisco, USA.
    doi: 10.21437/Interspeech.2016-986
16. Zhang, H., Chen, F., Yan, N., Wang, L., Shi, F., & Ng, M. L. (2016). The influence of language experience on categorical perception of vowels: Evidence from Mandarin and Korean. In Proceedings of the Interspeech 2016 (pp. 873-877), San Francisco, USA.
    doi: 10.21437/Interspeech.2016-887
17. Tong, E. T. S., Ng, M., & Yan, N. (2016). The effect of expiratory muscle strength training in Cantonese speaking Parkinson’s disease patients: A pilot study. In Movement Disorders, 31(S1), S12-S100.
    doi: 10.1002/mds.26576
18. Lai, W. W. S., & Ng, M. L. (2016). Different acoustic cues for emphasis in teaching English word stress to Hong Kong Cantonese ESL learners of different proficiencies. In Proceedings of 7th Tutorial and Research Workshop on Experimental Linguistics (ExLing2016) (pp. 91-94), St. Petersburgh, Russia: International Speech Communication Association.
19. Ng, M., Lam, K., & Chen, Y. (2016). Perception of whispered Cantonese tones. In Proceedings of the 12th Phonetic Conference of China (PCC2016)(pp. 746-750), Inner Mongolia, China.
20. Zhang, H., Yan, N., Chen, F., Wang, L., Su, I.-F., Ng, M. (2016). The interaction of semantic and orthographic processing during Chinese sonograms recognition: An ERP study. In Proceedings of the 17th Chinese Lexical Semantics Workshop (CLSW2016), Singapore.

1. (2016 - present) Associate Editor for the journal of Folia Phoniatrica et Logopaedica
2. (2009 - present) Honorary Consultant of the New Voice Club of Hong Kong.
3. (01/2018 - 12/2021) President of the Asia Pacific Society of Speech, Language, and Hearing
4. (01/2015 -12/2017) Vice President of the Asia Pacific Society of Speech, Language, and Hearing
5. (2011 - 2021) Council Member for the Asia Pacific Society of Speech, Language, and Hearing

Adjunct Faculty Positions

(09/2022 - present) Adjunct Professor, John G Rangos Sr., School of Health Sciences, Duquense University, Pittsburgh, USA

(05/2019 - present) Distinguished Visiting Professor, School of Foreign Languages, Nanjing Medical University, Nanjing, China

(05/2016 - present) Visiting Professor, School of Stomatology, Nanjing Medical University, Nanjing, China