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I can’t believe my ears !

I can’t believe my ears !. Subjective Loudness Pitch Tone quality. Objective Amplitude Frequency Spectrum. 440 Hz tone stepping down from 0 to -80 dB in 10 dB steps. 40 – 46,000 Hz. 100 – 50,000 Hz. 1,000 – 150,000 Hz. 1,000 – 100,000 Hz. Audio frequency ranges. 16 – 12,000 Hz.

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I can’t believe my ears !

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  1. I can’t believe my ears !

  2. Subjective • Loudness • Pitch • Tone quality Objective • Amplitude • Frequency • Spectrum

  3. 440 Hz tone stepping down from 0 to -80 dB in 10 dB steps

  4. 40 – 46,000 Hz 100 – 50,000 Hz 1,000 – 150,000 Hz 1,000 – 100,000 Hz Audio frequency ranges 16 – 12,000 Hz What? To What? 70 – 150,000 Hz Rhythm-pitch example

  5. A little experiment ! • Put your hand in the air • Put your hand down when you can’t hear the sound any more. • Keep an eye on who puts their hands down – and no cheating!!

  6. Presbycusis • After the age of 20 you lose 2 kHz from the upper range every 10 years • 30 years - 18 kHz • 40 years - 16 kHz • 50 years - 14 kHz • 60 years - 12 kHz • 90 years - 6 kHz

  7. Audiogram – “normal hearing”

  8. Audiograms – hearing “damage” Age related deterioration Occupational hearing damage

  9. Open CoolEdit

  10. Tri-tone paradox

  11. Rising and falling?

  12. Shepard tone

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