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Each Holter system has hardware (called monitor or recorder) for recording the signal, and software for review and analysis of the record. There may be a "patient button" on the front that the patient can press at specific instants such as feeling/being sick, going to bed, taking pills, marking an event of symptoms which is then documented in the symptoms diary, etc.; this records a mark that ...
The first product released by the new subsidiary was the MG1212, a 12-channel, 12-track recorder. [11] This innovative device used a specialized VHS-like cartridge (the MK-20) and could record 10 minutes of continuous 12-track audio at 19 cm per second or 20 minutes at half speed (9.5 cm per second).
TASCAM also introduced the first low-cost mass-produced multitrack recorders with Simul-Sync designed for recording musicians, and manufactured reel-to-reel tape machines and audio mixers for home recordists from the early 1970s through the mid-1990s. Since the early 00's, TASCAM has been an early innovator in the field-recording and audio ...
Lexicon was a pioneer in the hard disk recording market, introducing the Opus system in 1988. This system feature 8 channels of disk I/O along with an integrated 12-channel digital mixer. In the following years, Opus was upgraded with EQ and console automation. In the mid 1990s, Lexicon Studio and Core2 audio interfaces were introduced. They ...
There are many different types of cardiac monitors. In personal use, the Holter monitor is an external monitor which uses wires with patches that attach to the skin to continuously measure and record heart activity for 1–2 days. [5] An Event Recorder can be worn on the body for up to 30 days. [6]
Quatravox was the name of Realistic's synthesized four-channel output version of quadraphonic sound, which used Hafler circuitry to reproduce ambient sounds recorded by the microphones 180° out-of-phase with the intended recording (sounds recorded from opposite the microphone from the performers, i.e., studio echo, audience noise, etc.) and ...
Poison Profits. A HuffPost / WNYC investigation into lead contamination in New York City
Early public-address system from around 1920 using a Magnavox speaker. The microphone had a metal reflector that concentrated the sound waves, allowing the speaker to stand back so it would not obscure his or her face. The early vacuum tubes could not produce much gain, and even with six tubes the amplifier had low power.
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