| viXra.org > Digital Signal Processing > 2403 |
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| viXra.org > Digital Signal Processing > 2403 |
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[3] viXra:2403.0136 [pdf] submitted on 2024-03-30 01:28:54
Authors: Md Mubdiul Hasan
Comments: 4 Pages.
Hearing loss is a common health issue that affects nearly 10% of the world population reported by international studies. The hearing impaired typically experience more mental disorientation than those with normal hearing levels. It is often difficult to analyze hearing loss that would closely match with prescribed real ear gain/frequency responses due to technological limitations. The conventional device for hearing impairment is an electronic circuit whose main components are transducers (microphone and receiver). This study is focused on the electronic components those are relatively cheap and available in local market. In this paper the conventional active equalizer circuit especially bass, treble, and mid control based equalizer is implemented by op-amp LM741. Overall gain is split between input and output buffers, for bass ±15dB in 100Hz, mid ±9dB for 1kHz and for treble ±15dB in 10kHz. A trimmer-adjusted, lighter, pocket —carry device can be developed in this case.
Category: Digital Signal Processing
[2] viXra:2403.0095 [pdf] submitted on 2024-03-20 21:01:36
Authors: Jan Langen, Kerstin Sahler, Claus Brell
Comments: 13 Pages.
Today, the Internet of Things (IoT) is here to stay. In addition to various application areas, IoT is useful in the context of beekeeping, especially for digital and networked monitoring of hives. For practical implementation, differ-ent application layer protocols can be chosen. But which protocol is more suitable in the context of beekeeping? HTTP (Hypertext Transfer Protocol) or MQTT (Message Queuing Telemetry Transport)? This is one of the questions addressed in the Biene40 project, which focuses on networked sensors. In this paper, we derive the advantages and disadvantages of each protocol based on a literature review and the development of two IoT-based prototypes that communicate via either HTTP or MQTT. Our research show that the message overhead of the MQTT protocol is lower than that of HTTP. However, the connection cost of MQTT is quite high, especially at the beginning of a connection. Therefore, the choice of protocol depends on the specific use case. If only a few messages are transmitted at long intervals, HTTP is more resource efficient. With respect to the developed prototypes and the application context of beehive monitoring, HTTP is the preferred choice.
Category: Digital Signal Processing
[1] viXra:2403.0043 [pdf] submitted on 2024-03-11 20:24:08
Authors: Abdalrhman Alquaary, Hasan Bayhan
Comments: 11 Pages.
In industrial environments, achieving effective communication between electronic devices poses a multifaceted challenge that hinges on the seamless integration of both hardware and software protocols. This paper introduces AB485, a purpose-built data transfer protocol designed primarily for microcontroller-based systems, offering a streamlined solution to the complexities of software protocol implementation. We delve into AB485's design principles and features, underscoring its minimal hardware and software requirements. Notably, AB485 stands out for its ease of implementation, enabling engineers or system integrators to seamlessly integrate it into their projects. We also explore potential applications where AB485's efficiency and low overhead make substantial contributions to ensuring reliable data transmission. By presenting AB485, our research contributes to the field of data transfer protocols, offering an accessible and efficient solution for resource-constrained applications, while addressing the intricate interplay of hardware and software in data communication.
Category: Digital Signal Processing
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