Headphones
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Headphones are used to monitor audio signals in military applications. A wide variety of audio signals are listened to using headphones. Headphones allow military personnel to monitor different audio signals as part of their duties.
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Headphones
Headphones have three main parts: a voice coil, permanent magnet, and cone-like diaphragm. The diaphragm vibrates when electrical currents run through the voice coil, converting the electricity into sound waves. There are three main types - sound canceling which emit opposite sound waves, open back which have hard backs, and closed back which have holes in the back. Headphones were first used for radio work in 1919 and now serve purposes like listening to music on devices and airplane pilots communicating.
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Headphones
Headphones have three main parts: a voice coil, permanent magnet, and cone-like diaphragm. The diaphragm vibrates when electrical currents run through the voice coil, converting the electricity into sound waves. There are three main types - sound canceling which emit opposite sound waves, open back which have hard backs, and closed back which have holes in the back. Headphones were first used for radio work in 1919 and now serve purposes like listening to music on devices and airplane pilots communicating.
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The document discusses a smart note taker product that allows users to write notes in the air that are then digitally stored. It works by using a digital pen connected to a processor that senses hand motions and shapes using a database to recognize words. Notes can then be viewed on a display, shared digitally, or printed. Current products mentioned include mobile note takers that work with smartphones and PC note takers that capture and display writing in real time on a computer. Advantages include assistance for blind users and note-taking during phone calls or presentations.
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Busy families and individuals with physical limitation represent an attractive market for home automation and networking. A wireless home network that does not incur additional costs of wiring would be desirable. Bluetooth technology, which has emerged in late 1990s, is an ideal solution for this purpose.
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3) While current smartwatch owners are satisfied, opinions on replacing traditional watches and privacy protections were mixed. Future development depends on lowering costs and improving technology.
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As Digital Still Cameras (DSC) become smaller, cheaper and higher in resolution, photographs are increasingly prone to blurring from shaky hands. Optical image stabilization (OIS) is an effective solution that addresses the quality of images, and is an idea that has been around for at least 30 years. It has only recently made its way into the low-cost consumer camera market, and will soon be migrating to the higher end camera phones. This paper provides an overview of common design practices and considerations for optical image stabilization and how silicon-based MEMS dual-axis gyroscopes with their size, cost and performance advantages are enabling this vital function for image capturing devices
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This document discusses silent sound technology, which allows people to communicate without making audible sounds. It works by detecting tiny muscular movements in the lips during speech using electromyography or image processing techniques. This information is then converted to electrical signals and transmitted as synthesized speech. The technology could help those who have lost their voice or have speech impediments to communicate over the phone or translate between languages. However, it faces restrictions for tonal languages and in differentiating between speakers.
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The document discusses the history and features of smartwatches. It notes that the idea originated from Dick Tracy's communicating watch in comic strips from the 1940s. Early smartwatches were introduced in 2004 but discontinued by 2008. Modern smartwatches can receive calls, texts, emails and provide information like news, weather and sports when paired with a smartphone. They also track health data during workouts, including calories burned, heart rate and more. However, smartwatches still require a connected smartphone to be useful.
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This document discusses silent sound technology, which allows people to communicate without making audible sounds. It works by using electromyography to detect tiny muscle movements involved in speech and processing images of a person's mouth and face. The technology was first conceptualized in a 1968 film and is now being developed to allow "lost calls" in noisy environments to be answered silently. Potential applications include helping mute people communicate, secretly transmitting PIN numbers, and covert military communications. The technology is expected to be incorporated into phones and improve as nanotechnology advances.
sound sensor
A sound sensor is a device that detects sound waves and converts them into an electrical signal. It contains a microphone that picks up sound and processing circuitry that provides both an audio output and a digital indication of the presence of sound as well as an analog representation of its amplitude. Sound sensors work by converting sound waves into electrical signals that can then be read by instruments or used in applications like security systems. They have advantages like being affordable and easy to use for real-time sound manipulation but also disadvantages like requiring more memory and having limited wireless range.
Presentation on home automation
The past decade has seen significant advancement in the field of consumer electronics. Various ‘intelligent’ appliances such as cellular phones, air-conditioners, home security devices, home theatres, etc. are set to realize the concept of a smart home. They have given rise to a Personal Area Network in home environment, where all these appliances can be interconnected and monitored using a single controller.
Busy families and individuals with physical limitation represent an attractive market for home automation and networking. A wireless home network that does not incur additional costs of wiring would be desirable. Bluetooth technology, which has emerged in late 1990s, is an ideal solution for this purpose.
Home automation involves introducing a degree of computerized or automatic control to
Certain electrical and electronic systems in a building. These include lighting, temperature
Control etc.
This project demonstrates a simple home automation system which contains a remote mobile host controller and several client modules (home appliances). The client modules communicate with the host controller through a wireless device such as a Bluetooth enabled mobile phone, in this case, an android based Smart phone.
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The document discusses the MAX30102 pulse oximeter and heart rate sensor. It works by shining red and infrared LED lights through the skin and using a photodetector to measure the reflected light. Variations in the reflected light correspond to changes in blood volume with each heartbeat, allowing it to measure heart rate. It also uses how much red and infrared light is absorbed to measure blood oxygen levels through pulse oximetry. The MAX30102 connects to an Arduino via the I2C interface to output heart rate and oxygen saturation measurements.
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SmartWatch
1) The document discusses a group project analyzing smartwatches. It includes an introduction, mind map, survey results, and job assignments.
2) The survey of 51 people found that most do not own a smartwatch and view their functions as overlapping with smartphones. Price was a barrier to purchase.
3) While current smartwatch owners are satisfied, opinions on replacing traditional watches and privacy protections were mixed. Future development depends on lowering costs and improving technology.
Electronics seminar topics
1. The document lists over 100 potential seminar topics in computer science and information technology, ranging from embedded systems and extreme programming to biometrics, quantum computing, and more.
2. Some examples include elastic quotas, electronic ink, gesture recognition, graphics processing units, grid computing, and honeypots.
3. The broad range of topics provide many options for students or professionals to explore emerging technologies and issues in computing.
Surround Sound
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Headphones
- 21. In military applications, audio signals of many varieties are monitored using headphones.