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Uncalibrated Calibrator

by YousukeFuyama

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1.
250Hz-124dB 14:41
2.
336Hz-124dB 11:37
3.
Calibrating 14:49
4.

about

Recorded and processed sounds from a broken PISTONPHONE
Nominal: 250Hz-124dB
Brüel & Kjaer
TYPE 4220
**
"The calibration frequency, nominally 250Hz, is 251.2Hz ±0.1% as defined by ISO 266. The sound level produced by the pistonphone is nominally 124 ± 0.2 dB re 20 uPa at the reference conditions. Each pistonphone, however, is individually calibrated with an uncertainty of less than 0.09 dB and delivered with a calibration chart. When loaded with a microphone of one of the specified types, the uncertainty is less than 0.12 dB. The high sound level from the pistonphone allows correct calibration to be made in the field, even in very noisy surroundings."
***
en.wikipedia.org/wiki/Measurement_microphone_calibration

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released February 2, 2019

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about

YousukeFuyama Tokyo, Japan

Yousuke Fuyama is a composer, programmer, and audiovisual artist based in Tokyo, Japan. His creative practice in video, sound, installation, and graphic arts often involves digital programming and improvisational performance. This work explores the potential of audiovisual art as made possible by the interconversion of data across various interfaces and programmes. ... more

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