1000Hz is used in acoustics as reference frequency for testing. What is special in it, why not 688.5Hz or 440Hz? - Quora
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Based on the graph, what is the threshold of hearing in decibels for frequencies of 60, 400, 1000, 4000, and 15,000 Hz? Note that many AC electrical appliances produce 60 Hz, music
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An Ultimate Guide to Musical Frequencies | Understand Them like a Pro
400 Hz clean pure sine wave TEST TONE frequency - YouTube
Find the time period of a source of a sound wave whose frequency is 400 Hz .
1. Which of the following is a false statement? - ppt download
Power Supply Operation on a 400 Hz Source | DigiKey
Sound - VISTA HEIGHTS 8TH GRADE SCIENCE
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