LSBU - IOA Diploma student best final project NTI-Audio award

Award competition and ceremony for the Institute of Acoustics IOA Diploma best final research project 2022-23 at London South Bank University to receive NTI-Audio award

Artificial Intelligence for acoustics Artificial Intelligence for acoustics

Led the organisation at LSBU of Institute of Acoustics "Artificial Intelligence for acoustics", one day conference held at LSBU on 22 May 2024

Suitability of HI-FI sound systems in measurements of reverberation time in domestic multi-media rooms

Reverberation time measurements are taken as part of the acoustic design of residential performance rooms such as home cinemas, listening rooms and studios This study examines the suitability of using Hi-Fi sound systems for the reverberation time measurements in domestic multi-media rooms Seven residential rooms were measured for reverberation time (T20) following ISO 3382-02-2008 using in turn a dodecahedron source, and Hi-Fi loudspeakers as the excitation sound sources. Tests used gated pink noise as well as integrated impulse response methods and results were compared. Overall T20 results from both sound sources agreed within 5% from 500Hz upwards, remaining very closely aligned as the frequency increased. A discrepancy of around 10% was observed between results obtained from both methods regardless of sound source employed This study showed that Hi-Fi loudspeakers can be a suitable and reliable sound source for reverberation time measurements in multi-media domestic rooms. This finding can give confidence in the use of existing Hi-Fi loudspeakers installed in domestic rooms to aid in their interior acoustic design

Upaya Meningkatkan Aktivitas Dan Hasil Belajar Mahasiswa Melalui Pembelajaran Kolaboratif Dengan Pendekatan Pemecahan Masalah

Penelitian ini bertujuan untuk memperoleh gambaran model pembelajaran kolaboratif dengan pendekatan pemecahan masalah pada mata kuliah teori akuntansi dan mengetahui efektifitas penggunaan model pembelajaran tersebut. Populasi dalam penelitian ini adalah mahasiswa jurusan akuntansi yang sedang menempuh mata kuliah teori akuntansi. Pengambilan sampel berjumlah 90 dilakukan dengan teknik simple random sampling. Data dikumpulkan dengan metode dokumentasi dan metode tes (pre test & post test) kemudian dianalisis dengan uji t. Â Hasil penelitian menunjukkan bahwa model pembelajaran kolaboratif dengan pendekatan pemecahan masalah pada mata kuliah teori akuntansi sangat efektif dalam meningkatkan prestasai belajar mahasiswa. Hal ini terbukti dari hasil uji t yang menunjukkaan adanya perbedaan yang signifikan antara kelas yang memperoleh pembelajaran kolaboratif dengan pendekatan pemecahan masalah dengan kelas yang tidak memperolehnya

Review of Test Procedures for the Characterisation of the Acoustics Properties of Alternative Ventilation Ducts

In recent years there has been a surge in the use of alternative ducts for residential ventilation in lieu of galvanized steel ducting. This is mainly owed to cost, installation and other practical benefits afforded by alternative ducts. However, to date there is no information on the acoustic characteristics for these types of ducts to enable accurate prediction of noise transfers for such systems. This lack of reliable information often leads practitioners to make crude estimations or base their calculations on galvanized ducting acoustic data. These approximations can result in over attenuated designs which use unnecessary silencers introducing additional cost, regenerated noise and inefficiency. Designs that result in under attenuated systems will require costly retrospective mitigation measures. The ongoing research aims to fill that knowledge gap by characterising the acoustic properties of alternative ventilation ducts as used for the residential ventilation systems. In a prelaminar review of the literature, no harmonised and verified methodology was found for testing the acoustic performance of ventilation ducts and their systems elements. As a part of the research, a thorough review and analysis of all current testing methodologies used in the industry and in research is being carried out. The review involves an industry wide consultation to learn the different aspects of test methodologies employed. This will enable the development of a robust industry-accepted and standardised test methodology. A brief literature review and analysis of relevant test methodologies and procedures will be presented as well as results from the industry wide consultatio