RECAV 2017

The 2017 Regional Conference on Acoustics and Vibration (RECAV) is a conference with an agenda for research publications and workshops in the field of acoustics and vibration. The conference was organized by the Indonesian Acoustics and Vibration Association and the Society of Acoustics Singapore (SAS) and in collaboration with the Acoustical Society of America (ASA), International Commission on Acoustics (ICA), Sepuluh Nopember Institute of Technology (ITS), and Bandung Institute of Technology ( ITB). This conference was also supported by several other educational institutions, both from within the country and from abroad.

RECAV 2017 will be held on 27-28 November 2017 in Denpasar, Bali. This conference will present several well-known things in the acoustics field such as Jeong Guon Ih (President Emeritus of Acoustical Society of Korea), Wong Siong Gan (President of Society of Acoustics Singapore), Prof. Kazuya Takeda (Vice-President of Acoustical Society of Japan / ASJ), and several other professional figures. Prof. Intan Ahmad, Ph.D as General of Learning and Student Affairs from the Ministry of Research, Technology, and Higher Education was also invited by the Director in this activity.

At RECAV 2017, ALTA Integra sent 2 room modes related to paper and sound insulation panels for presentation. In this article, we will discuss abstract papers related to room mode.

Figure 1. Abstract Paper “Study of the Effect of Widening the Wall
to Modify Acoustic Mode Distribution in Small Rooms”

The author of this paper entitled “Study of the Effect of Widening Walls to Modify the Distribution of Acoustic Modes in Small Spaces” is Herwin Gunawan, with co-author Teguh Aditanoyo. This research is based on the problem of the room mode in the room which can affect the characteristics of the sound source. This paper discusses the particular choice of using a playing wall to change the mode of a room without a lot of space.

This study tries to use different input room ratios, including the random ratio method, display wall, Bolt, Louden, and Cox. The use of different room ratio methods is then calculated and compared the results.

The characteristics of low-frequency sound in the room were analyzed using the Finite Element Method (FEM). From this method, graphic data of sound pressure level (SPL) was analyzed to determine the best room ratio method to use.

It is hoped that ALTA Integra can continue to participate in research publications like this and be able to improve the quality of ALTA Integra as a building physical consultant from the acoustic, lighting, and thermal aspects.