Another unusual full-range driver design is the Walsh driver, popularized in Ohm hi-fi speaker systems, where they reproduced almost the entire audible range of frequencies.
22.
Our eyes only see at three different frequencies ( unlike our ears which can hear all frequencies within our audible range )-but the result is the same.
23.
Noise shaping is used to lower the noise present in the audible range ( 20 Hz to 20 kHz ) and increase the noise above the audible range.
24.
Noise shaping is used to lower the noise present in the audible range ( 20 Hz to 20 kHz ) and increase the noise above the audible range.
25.
As shown on manufacturers'datasheets, the mic capsule retains its directionality ( cardioid or supercardioid polar pattern ) and prevents comb filtering by keeping phase interference above the audible range.
26.
Anything with a motor or compressor will create EMI and power fluctuations in the audible range; but so can a variety of other electronic devices like televisions and other amplifiers.
27.
Ultrasound machines use sound waves at frequencies of 1 million to 20 million hertz, or cycles per second, far above the audible range, which is 20 to 20, 000 hertz.
28.
But if set to a frequency outside the human audible range then the ear can't perceive the square wave, only the difference between the speaker being switched on and off.
29.
Exposure to more intense ultrasound over 140 dB near the audible range ( 20 40 kHz ) can lead to a syndrome involving manifestations of nausea, headache, tinnitus, pain, dizziness and fatigue,
30.
Modern premium components make it easy to produce amplifiers that are essentially flat over the audio band, with less than 3 dB attenuation at 6 Hz and 70 kHz, well outside the audible range.
