Reverberation time improvement of lecture auditorium: A case study

2018 ◽  
Vol 49 (1) ◽  
pp. 14-19
Author(s):  
Saurabh Yadav ◽  
Gaurav Sharma ◽  
Sarthak Nag ◽  
Arpan Gupta
Keyword(s):  
Speech Intelligibility ◽  
Indian Institute ◽  
Experimental Results ◽  
Reverberation Time ◽  
Acoustic Performance ◽  
Institute Of Technology

In this study, reverberation time of a lecture auditorium has been analyzed experimentally and analytically. It is well-known fact that reverberation time affects the speech intelligibility and hence should be within the range of possible optimum values. Experiments were performed to calculate the reverberation time of a lecture auditorium constructed at Indian Institute of Technology Mandi (IIT Mandi), for different internal conditions such as furniture and curtains. Experimental results were compared with the theoretically calculated values of reverberation time. It is found that acoustic performance of the lecture auditorium has significantly improved using curtains on the windows and furniture. For further improvement, it has also been suggested to use the carpet on the floor of the auditorium. The theoretical value of reverberation time is also calculated to show the improvement which can be achieved using carpet. The effect of audience on reverberation time has also been studied theoretically.

Experimental Structural Stiffness Analysis of a Surgical Haptic Master Device Manipulator

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
İbrahimcan Görgülü ◽  
Mehmet İsmet Can Dede ◽  
Giuseppe Carbone
Keyword(s):  
Model Fitting ◽  
Experimental Results ◽  
Fine Tuning ◽  
Structural Stiffness ◽  
Stiffness Analysis ◽  
Stiffness Model ◽  
Stiffness Evaluation ◽  
Institute Of Technology ◽  
Master Device

Abstract This paper deals with haptic devices for master–slave telesurgical applications. Namely, a stiffness model fitting methodology and its fine-tuning are proposed based on experimental results. In particular, the proposed procedure is based on virtual joint structural stiffness modeling to be applied in time-efficient compliance compensation strategies. A specific case study is discussed by referring to the HISS haptic device that has been developed and built at Izmir Institute of Technology. Two different experimental setups are designed for stiffness evaluation tests. Experimental results are discussed to demonstrate their implementation in the proposed methodology for the fine-tuning of stiffness model.

The Nature and Scope of Industry—Institute Interaction in India

1998 ◽  
Vol 12 (5) ◽  
pp. 303-312 ◽  
Author(s):  
R. Natarajan
Keyword(s):  
Education Research ◽  
Professional Practice ◽  
Research University ◽  
Indian Institute ◽  
Close Link ◽  
Industrial Sectors ◽  
Indian Context ◽  
Research Organizations ◽  
Institute Of Technology

One of the most important functions of a modern research university is interaction with industry in order to establish a close link between education, research, and professional practice. This paper examines relevant issues with special reference to the Indian context: Indian industry's perceptions of the curricula offered by the universities; the prerequisites for an institution if it is to develop successful cooperation with industry; the interaction between scientific and industrial research organizations and industry; and basic differences and contentious issues that arise between the higher education and industrial sectors in terms of roles, goals and perceptions. An analysis is also presented of some barriers or inhibitors to cooperation, and strategies to overcome them are suggested. Against this background, the author offers a case study of current initiatives designed to promote interaction with industry at the Indian Institute of Technology, Madras.

Study on the Use of Micro-Perforated Panel to Improve Acoustic Performance in Mosque

2013 ◽  
Vol 393 ◽  
pp. 971-975
Author(s):  
Azma Putra ◽  
D. Hafizah ◽  
M.Y. Yaakob ◽  
Mohd Jailani Mohd Nor
Keyword(s):  
Decay Time ◽  
Speech Intelligibility ◽  
Sound Absorption ◽  
Reverberation Time ◽  
Frequency Range ◽  
Simulation Data ◽  
Acoustical Properties ◽  
Acoustic Performance ◽  
Friday Prayer ◽  
Acoustic Treatment

Most activities in mosque such as Friday prayer and the sermon by an Imam require clarity of speech. Unfortunately, this speech intelligibility performance is often poor due to initial design of a mosque. This paper presents assessment of the indoor acoustics of a mosque. Acoustical properties such as reverberation time, clarity and early decay time are obtained from simulation data using CATT indoor acoustic software. The study started with an empty mosque with no acoustic treatment. Acoustic green absorbers using micro-perforated panel (MPP) are then introduced to improve the acoustic performance. The application of MPP is still rare for mosque and is expected to replace the typical porous absorber. The effect of the panel size, location and frequency range of sound absorption are simulated and the results are discussed.

scholarly journals Acoustic Design of a Classical Concert Hall and Evaluation of its Acoustic Performance – A Case Study

2018 ◽  
Author(s):  
Kwangbok Jeong ◽  
Taehoon Hong ◽  
Sung Hoon Kim ◽  
Jimin Kim ◽  
Sangyoub Lee
Keyword(s):  
South Korea ◽  
Simulation Modeling ◽  
Decision Makers ◽  
Reverberation Time ◽  
Acoustic Parameters ◽  
Concert Hall ◽  
Acoustic Performance ◽  
Acoustic Design ◽  
Acoustic Simulation

This study aims at an acoustic design of the classical concert hall and evaluation of the acoustic performance. In terms of three acoustic parameters (i.e., reverberation time (RT), clarity (C80), and lateral fraction (LF)), this study performed acoustic simulation modeling and site measurement with the K Art Hall located in South Korea as a case study. First, in order to meet the acoustic performance of the K Art Hall (target RT: 1.4~1.7 seconds, target C80: -2dB or more +2dB or less, and target LF: 10~35%), the finish materials and shape of the room as an interior acoustic design were determined. Second, the average values of the RT, C80, and LF using the acoustic simulation modeling were estimated at 1.4 second, 1.2~1.6 dB, and 29%, respectively. Third, the average values of the RT, C80, and LF through site measuring were measured at 1.5~1.64 second, 0.07~1.31dB, and 22.22~31.37%, respectively. Thus, the results of both the acoustic simulation modeling and site measuring were analyzed so as to satisfy the target acoustic performance. The results of this study will help the decision-makers (i.e., owner, construction managers, etc.) to plan the classical concert hall in terms of the RT, C80, and LF.

scholarly journals Marketing of Library Resources, Services and Products: A Case Study of IIT Delhi

2016 ◽  
Vol 36 (3) ◽  
Author(s):  
Vanita Khanchandani ◽  
Nabi Hasan
Keyword(s):  
Special Reference ◽  
Indian Institute ◽  
Marketing Strategies ◽  
Comprehensive Overview ◽  
Library Users ◽  
The World ◽  
Library Resources ◽  
Institute Of Technology

Indian Institute of Technology, Delhi is one of the premier institutes of India and was established in 1961. To cater the research and the teaching needs of the institute, Central Library, IIT Delhi is providing different resources, services and products to the faculty and the students. To maximise the usage and for increasing the importance, libraries in the present era around the world are adopting the different marketing strategies. Marketing besides providing sustainability, also helps in realising the goals of libraries.This paper provides a comprehensive overview on different marketing strategies adopted by libraries with special reference to Central Library, IIT Delhi for reaching to its users and to increase the outreach. The paper is intended to help professionals and the library users in knowing the various resources, services and products provided by the Central Library, IIT Delhi as a model to be explored and followed by other libraries and their administrators.DOI: 10.14429/djlit.36.3.9813

A Family With Autosomal-Dominant Progressive Sensorineural Hearing Loss

1996 ◽  
Vol 5 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Chris Halpin ◽  
Barbara Herrmann ◽  
Margaret Whearty
Keyword(s):  
Speech Production ◽  
Hearing Aids ◽  
Role Models ◽  
Speech Intelligibility ◽  
Large Scale ◽  
Speech Language Pathology ◽  
The Family ◽  
Patient Will ◽  
Language Pathology

The family described in this article provides an unusual opportunity to relate findings from genetic, histological, electrophysiological, psychophysical, and rehabilitative investigation. Although the total number evaluated is large (49), the known, living affected population is smaller (14), and these are spread from age 20 to age 59. As a result, the findings described above are those of a large-scale case study. Clearly, more data will be available through longitudinal study of the individuals documented in the course of this investigation but, given the slow nature of the progression in this disease, such studies will be undertaken after an interval of several years. The general picture presented to the audiologist who must rehabilitate these cases is that of a progressive cochlear degeneration that affects only thresholds at first, and then rapidly diminishes speech intelligibility. The expected result is that, after normal language development, the patient may accept hearing aids well, encouraged by the support of the family. Performance and satisfaction with the hearing aids is good, until the onset of the speech intelligibility loss, at which time the patient will encounter serious difficulties and may reject hearing aids as unhelpful. As the histological and electrophysiological results indicate, however, the eighth nerve remains viable, especially in the younger affected members, and success with cochlear implantation may be expected. Audiologic counseling efforts are aided by the presence of role models and support from the other affected members of the family. Speech-language pathology services were not considered important by the members of this family since their speech production developed normally and has remained very good. Self-correction of speech was supported by hearing aids and cochlear implants (Case 5’s speech production was documented in Perkell, Lane, Svirsky, & Webster, 1992). These patients received genetic counseling and, due to the high penetrance of the disease, exhibited serious concerns regarding future generations and the hope of a cure.

scholarly journals Analyzing free variation with harmony – A case study of verb-cluster serialization

2020 ◽  
Vol 39 (3) ◽  
pp. 407-437
Author(s):  
Markus Bader
Keyword(s):  
Native Speakers ◽  
Initial Position ◽  
Experimental Results ◽  
Modal Verbs ◽  
Weighted Constraints ◽  
Corpus Data ◽  
Frequency Relationship ◽  
Zero Frequency ◽  
Free Variation

Abstract In German, a verb selected by another verb normally precedes the selecting verb. Modal verbs in the perfect tense provide an exception to this generalization because they require the perfective auxiliary to occur in cluster-initial position according to prescriptive grammars. Bader and Schmid (2009b) have shown, however, that native speakers accept the auxiliary in all positions except the cluster-final one. Experimental results as well as corpus data indicate that verb cluster serialization is a case of free variation. I discuss how this variation can be accounted for, focusing on two mismatches between acceptability and frequency: First, slight acceptability advantages can turn into strong frequency advantages. Second, syntactic variants with basically zero frequency can still vary substantially in acceptability. These mismatches remain unaccounted for if acceptability is related to frequency on the level of whole sentence structures, as in Stochastic OT (Boersma and Hayes2001). However, when the acceptability-frequency relationship is modeled on the level of individual weighted constraints, using harmony as link (see Pater2009, for different harmony based frameworks), the two mismatches follow given appropriate linking assumptions.

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