Audibility of emergency broadcasting sound in a mechanical room in an office building

Fire alarm and emergency broadcasting sound are important in fire and disaster situations. For the clear presentation of the fire alarm and emergency broadcasting sound to occupants of buildings, some guidelines and requirements were established. In NFPA 72 and BS standard, a specific alarm sound level for alarm sound of residential facilities was proposed and Speech Transmission Index(STI) was regulated for the emergency broadcasting system. In the fire and disaster situation, one of the important facility is a mechanical and electrical system to maintain water and electricity supply. To maintain this function in the buildings, clear presentation of emergency broadcasting sound to the workers in the mechanical and electrical room is crucial for the emergency operation of the system. In this study, the noise level in the mechanical rooms and electricity facilities of more than 40 years old office building were measured. Also, audibility and room acoustic properties such as reverberation time and STIwas simulated using Odeon 12. In order to deliver emergency broadcasting sound more clearly, sound absorption material and a soundproof chamber for noisy devices are needed. Also, the emergency broadcasting system in noisy facilities should be improved to produce the broadcasting sound louder and clearer.

Design of Personal Mobility Safety System Using AI

In this paper, we propose the implementation of a safety device that generates an alarm sound or braking operation to reduce the risk of accidents. It reduces the exposure of risks due to non-wearing by supplementing the function of the helmet for safety. For machine learning, the safety state is learned by using two types of sensing data, and when an abnormal helmet use or speed or drinking driving is detected, an alarm sound is generated and motion is broken to maintain the safe state. By measuring data using a gas sensor, alcohol is checked and this is used as abnormal data. Users form a habit of wearing safety equipment with continuous safety alarm sound and speed braking and proper driving habit by driving in a normal state without drinking alcohol. In addition, the proposed system enables real-time monitoring, thereby reducing risks by continuously maintaining safe driving and wearing protective equipment. The proposed system uses artificial intelligence to discriminate data related to helmet wearing, speed, and drinking in making an electric kickboard for safety, and triggers an alarm or operates the brake to prevent abnormal driving. If the design and function are supplemented, it will become a basic function that can be applied to various equipment of transportation.

Innovative Device for Enhancing Physical Distancing in the COVID-19 Situation

Objective: During the COVID-19 pandemic, physical distancing is one of the non-pharmaceutical measures that was recommended to reduce COVID-19 spread. Studies regarding physical distancing intervention and its effectiveness in Thailand have rarely been reported. This study aimed to evaluate physical distancing compliance among newly developed media interventions. Methods: We used accidental sampling and the data collection method was observation via CCTV, at the university canteen. Three interventions, including an attractive picture, a flashing red-light, a speech alarm sound and the conventional intervention were employed to 400 customers. Each intervention was monitored in non-prime hours. Results: The quasi-experimental study of 400 participants, the success rate of developed intervention including a flashing red light (6.0%, p = 0.279), an attractive picture (5.0%, p = 0.445) and a speech alarm sound (4.0%, p = 0.683) in promoting physical distancing compliance was not statistically significant from conventional intervention (2.0%). However, there was a statistically significant enhancement of physical compliance in some marking positions in our intervention. Conclusion: The effectiveness of the innovative device was not statistically significant to enhance physical distancing compliance among customers of the university canteen. The compliance statistically significantly enhances in some marking points. The integration of the use of media into conventional interventions provides an alternative for enhancing physical distancing.

Performance Analysis of the the Single Alarm Detector in the Rooms of Single Houses by Computer Simulation

This study was conducted to examine the performance in the space for a single alarm type detector installed in a single house. Three types of houses were used, including two types of one-story and two-story houses. A computer simulation program was used to predict the sound pressure level in response to the occurrence of an alarm sound in a residential space. The characteristics of the sound source applied to the simulation were directly measured and used as input data. As a result of simulation, it was found that the sound pressure level in the kitchen and living room generally met the standard when the alarm sound of the detector occurred. However, the sound pressure level in the bedroom was predicted to be at least 20 dB (A) lower than the American Fire Protection Association standard of 75 dB (A). Therefore, a plan should be prepared to maintain a sufficient sound level in the bedroom space inside the house, and efforts will be needed to ensure safe evacuation in case of fire by establishing relevant standards.

Alarm Sound Propagation Characteristics of Gas Extinguishing System Installed in Computer Server Room

Gas extinguishing systems are used for fire protection in server rooms and data centers. In the fire safety standards (NFSC 106, 107) of gas extinguishing systems (carbon dioxide, halon, and clean agent extinguishing system), sound alarm devices are installed in each protected area to provide an effective warning to personnel in the protected area or areas with objects to be protected. By measuring the noise level generated in a small server room, it was found that more than 70 dB of noise was generated. Therefore, to effectively transmit alarm sound to workers in all areas within the protection area, such as a server room, an acoustic alarm device must be designed and installed so that an alarm sound is transmitted at a level of 15 dB or higher than the noise level generated by equipment installed in the facility. As a result of predicting the alarm sound through the room acoustic simulation for a small server room equipped with an acoustic alarm system in a cabinet-type gas extinguishing system, it was found that it was insufficient in effectively delivering an alarm sound to the entire protection area. To effectively transmit an alarm sound inside the protection area where a gas extinguishing system is installed, the output of the alarm device needs to be increased and the room acoustic parameters should be predicted in advance using room acoustic prediction techniques and actively adjusting the acoustics according to the noise generated inside the protection area. Additionally, the distance between alarm devices needs to be shortened to deliver sufficient alarm volume throughout the protection area, and it is necessary to establish specific standards for this.

STUDI PENERAPAN DESAIN UNIVERSAL PADA MASJID MANARUL AMAL KAMPUS MERUYA DI UNIVERSITAS MERCU BUANA JAKARTA BARAT

Mosque design based on the universal design principle is a design concept for a mosque architecture that can be used by a person with disability users. Mosque as the center of religious activities is ‘Allah’s house’ where the congregation conducts praying. Shalat is essential to worship in Islam done at least five times a day and cannot be abandoned unless very specific condition happens (as explained in Al Qur’an). But in fact, hearing disability users still find difficulties in accessing mosques, most mosques are not accessible. This study aims to describe of study of universal design application at the Manarul Amal mosque on the Meruya campus at Mercu Buana University for a person with disabilities. The universal design principle is chosen based on the possibilities it provides to explore each potential tool to reduce or even eliminate the physical barrier for its users. This research method uses a qualitative descriptive method. The instrument of this study was researchers who were assisted with observation guidelines, interview guidelines and documentation guidelines based on the grid Minister of Public Works Regulation No. 14 / PRT / M / 2017. The steps of data analysis carried out include: data reduction, data presentation, and conclusion. The results showed that the interior elements in the Manarul Amal mosque were in form of circulation, guiding paths, ramps, prayer rooms, sermon rooms, ablution rooms, shelves for footwear (shoes and feet) and supporting facilities attributes that didn’t meet the standard. While the walls of a room aren’t equipped with handrail, lighting, and colors are sufficient to meet the standards and audiovisual that is around the prayer room without a TV text, visual alarm (sound calling when praying).

Development of Vehicle Door Security using Smart Tag and Fingerprint System

Research and development advancements in the area of Vehicle Door Security using Smart Tag and Fingerprint System. Fingerprint biometric is one of the popular, ubiquitous, reliable, economical and efficient biometric technologies. Due to its versatility, fingerprint biometric is applicable. Fingerprint is popular because of its universality, uniqueness, permanence, acceptability, performance [1]. The Arduino as a controller between RFID Sensor, Fingerprint Sensor, Buzzer, LCD, LED and Relay. This research implemented for security purpose to protect the safety of vehicle from vehicle theft or burglary. It is very useful and important for alert the people who have vehicle to protect it from theft. This is a very important system to be implemented at the main door of vehicle. The system started to work when the user access either than one system fingerprint or smart tag to lock and unlock the door. The fingerprint system only user can access their fingerprint whereas the smart tag system can access by user or user’s intimate relative when they borrow the vehicle for emergency. The vehicle door cannot be opened when unmatched fingerprint is access or incorrect smart tag is access. Once the incorrect smart tag is access by unauthorized person, the buzzer will be activated and produce a high level of alarm sound to alert the user. The Arduino Uno microcontroller is controlled by the entire system of the project. Hence, it is easy to implement and available to use because it has a simple function, so this system can be enhancing with modern technology so it can be applying into vehicle part for secure the vehicle