Acoustic Echo Cancelling School Desk

Abstract

The invention relates to an acoustic school desk (1) designed to improve the acoustic performance of furniture consisting of desks and chairs used in educational institutions, having sound-absorbing and vibration-dampening properties, reducing reverberation time, increasing sound intelligibility and preventing noise pollution in the classroom environment.

Description

1 TARIFF Acoustic Echo Cancelling School Desk TECHNICAL FIELD The invention improves the acoustic performance of school desks used in educational institutions. furniture structure designed for this purpose, with sound-absorbing and vibration-dampening properties. It is related. The invention, in particular, reduces reverberation time, improves sound intelligibility, and enables sound reproduction in a classroom setting. It is related to the school desk arrangement that helps prevent noise pollution. STATE OF THE ART School desks used in educational institutions are generally made of wood, metal, or hard plastic. 15 It consists of a table and seats made of material, with legs and a flat surface. Classrooms, halls and rooms. Floors are mostly made of hard tile, ceramic, or other materials for durability and ease of cleaning. They are made of concrete materials. These hard surfaces transmit sound waves at a high rate. by reflecting the sounds produced by both teachers and students within the classroom This causes reverberation. As a result, the ambient noise level increases and 20 The intelligibility of the teacher's voice is reduced. In large classrooms, the reverberation time... (Reverberation) becomes more pronounced and reduces learning efficiency. Although acoustic improvements using wall or ceiling panels are available today, Furniture generally lacks sound-absorbing or vibration-dampening properties. This 25 Therefore, the sound continues to reflect off the floor and the furniture structure. In the known state of the art, echo reduction in equipment such as classroom seating arrangements and desks. and various applications on solutions that will provide directed sound insulation. There are 30. • Traditionally, to solve classroom acoustic problems, ceilings, walls, and Sound-absorbing panels or acoustic arrangements are installed on the floor surfaces. This helps to reduce the reflection of sound from hard surfaces. 35 • Acoustic enhancements applied to furniture often involve "sound-absorbing surfaces" or within the framework of general furniture design parameters such as "reflective coating" 2 This has happened. However, this type of furniture includes features that make it easier to use. Echo reduction structures without disrupting teacher-student interaction. It is not available. In summary, there are 5 key improvements currently needed for echo control in classroom environments and at the furniture level. Despite advancements, an integrated acoustic echo canceller design at the school desk level is needed. In other words, it reduces and directs the echo reflection within each student's seat, In the literature, it is described as a systematic solution that includes sound-absorbing or insulating surfaces if necessary. It is not widely available. This situation affects classroom sound quality and teaching effectiveness. This creates a need for an increase in this area. 10 THE PURPOSE OF THE INVENTION The present invention meets the aforementioned requirements while eliminating all disadvantages. This relates to acoustic echo-reducing school desks, which eliminate echo and offer some additional advantages. 15 The main purpose of the invention is to reduce classroom echo and lower noise levels using a table. and by using acoustic materials integrated into the chair: to increase sound absorption, reduce vibration Preventing transmission by providing a modular, hygienic and durable structure in educational environments. The goal is to create school desks that improve acoustic comfort. 20 The aim of the invention is to create a device with sound-absorbing and vibration-damping properties, and a reduced reverberation time. noise pollution in the classroom environment is reduced, sound intelligibility is improved, and minimized. The aim is to reveal the school desk structure in which it was downloaded. The structural and characteristic features and all the advantages of the invention are given in the figures below. Thanks to the detailed explanation written with references to the figures, it becomes clearer. This will be understood, and therefore the evaluation will also take these forms and detailed explanations into account. It must be done by taking it. BRIEF DESCRIPTION OF THE FIGURES The best way to utilize the advantages of the existing invention, together with its structure and additional elements. For it to be understood, it must be considered together with the figures explained below. 35 Figure 1 shows the general view of the acoustic echo-reducing school desk, which is the subject of the invention. Figure 2 shows a cross-sectional view of the acoustic echo-reducing school desk, which is the subject of the invention. 3 REFERENCE NUMBERS 1 – Acoustic school desk 2 – Micro-perforated polymer layer 3 – Acoustic coating 5 4 – Chairs – Air gap 6 – Table 7 – Rubber feet 8 – Rail connection 10 9 – Acoustic coating-b – Bituminous sound insulation tape The drawings do not necessarily need to be scaled and are necessary for understanding the invention. Details that are not present may have been overlooked. Furthermore, at least to a large extent, 15 Elements that are identical or at least have substantially identical functions are numbered the same. It is shown. DETAILED DESCRIPTION OF THE INVENTION In this detailed description, the preferred configurations of the acoustic school desk (1) which is the subject of the invention are described. purely for the purpose of better understanding the subject and without any limiting influence. It is explained in a way that will not create a problem. The invention basically consists of a table (6) and a chair (4). The bottom of the tabletop (6) This section contains a multi-layered acoustic structure. This structure, from outside to inside, consists of (e.g., acoustic 25) layers. coating (3), micro-perforated polymer layer (2), air gap (5) and bituminous sound insulation tape (10) layers are made up of. Similarly, the lower part of the chair also has acoustics. Coating-b (9) and bituminous sound insulation tape (10) are included. The following section of the specification refers to micro-perforated polymer sheet (2), acoustic coating (3) Sound insulation consisting of air gap (5) and bituminous sound insulation tape (10) layers 30 The insulation layer will be called an acoustic panel. Micro-perforated polymer sheet (2): Contains micro-perforations with a diameter of 0.5–2 mm. This structure, sound It disperses the initial reflected energy of the echo by allowing the waves to penetrate. Polymer The material is both lightweight and impact-resistant. 4 Acoustic coating (3, 9): Polyester or glass with a density between 250–350 g / m². Fiber-based felt is used. This layer absorbs mid-frequency sounds (500–2000 Hz), classifying it as a high-frequency material. It reduces the echo in the environment. The aforementioned acoustic coating (3,9) is preferably made of felt material. It is a manufactured product. Air gap (5): An air gap of 10–20 mm is left between the felt and the bituminous layer. Low-frequency sounds are dampened through the resonance effect. Bituminous sound insulation tape (10): Thanks to its solid and viscoelastic structure, it converts vibration energy into heat. It transforms the structure. It also adds mass to the structure, thus lowering the resonance frequency. Rubber feet (7): Prevent vibrations from the floor, thus reducing the sound of the table and chair. Its conductivity is reduced. 10 Rail connection (8): Acoustic panels can be easily mounted to a table (6) or chair (4). It enables operation; it offers a modular system when maintenance, cleaning or parts replacement is needed. Figure 1 shows a general view of an acoustic echo-reducing school desk. Basically, It consists of a table (6) and chairs (4). Under the tabletop (6) There is acoustic coating (3). The chair (4) has acoustic coating-b (9) on the bottom; 15 on the floor. On the contact part there are rubber feet (7). The bottom of the table (6) and chair (4) Easy assembly of the acoustic structure with the rail connection (8) system created on the sides is provided. Figure 2 shows a cross-sectional view of an acoustic school desk (1). In this cross-sectional view, 20 with the acoustic structure located under both the table (6) and the chair (4) It is shown. In the lower part of the table (6); micro-perforated polymer layer (2), acoustic coating (3), air gap (5) and fixed laminated bituminous sound insulation tape (10) are included. In the lower part of the chair (4); acoustic coating-b (9) and bituminous sound insulation tape (10) are located It takes. The structures that make up this insulation panel are two 25 on both the table (6) and the chair (4). By being assembled with the rail connection (8) created on the sides, double layered (felt + bitumen) significantly reduces echo and resonance effects by creating sound insulation. Rubber feet (7) reduce the transmission of vibrations from the floor to the furniture frame. This system blocks sounds in the 500–2000 Hz range in a classroom environment. It can reduce echo time by 10–15%. 30

Claims

REQUESTS 1. The invention is designed for use in educational institutions to reduce echo time and created to improve sound intelligibility, consisting of a table (6) and a chair (4) The acoustic school desk (1) consists of; its feature is; 5 • Sound waves on the underside of the mentioned table (6) and / or chair (4) by allowing it to penetrate, it disperses the initial reflected energy of the echo, the most at least one micro-perforated polymer layer on the outside (2), • Sound absorber and vibration damper on the underside of the mentioned table (6) and / or chair (4) 10 air gap with micro-perforated polymer layer (2) with damping properties (5) at least one acoustic coating located between (3,9), • Between the mentioned acoustic coating (3,9) and the bituminous sound insulation tape By leaving an air gap, low-frequency sounds are produced through resonance. at least one air gap (5) that provides damping, 15 • The aforementioned air gap (5) and the bottom surface of the table (6) and / or chair (4) located between them, converting vibrational energy into heat, resonance frequency a bituminous sound insulation tape (10) that reduces noise It is characterized by its inclusion. 20 2. An acoustic school desk (1) conforming to Claim 1; its feature is that the acoustic panels are on the desk (6) and / or parts that enable mounting to the chair (4), maintenance, cleaning or parts offering a modular system when change is needed, the bottom side of the table (6) and chair (4) It includes the rail connection (8) created in its parts. 25 3. An acoustic school desk (1) conforming to Claim 1; its feature is the acoustic coating mentioned. (3,9) polyester and / or glass fiber based with density varying between 250–350 g / m² It contains felt.