Test Tone

Interictal high-frequency oscillations (80-500 Hz) are an indicator of seizure onset areas independent of spikes in the human epileptic brain . Epilepsia .

The audio spectrum is the audible frequency range at which humans can hear and spans from 20 Hz to 20,000 Hz. … Summary Table. Frequency RangeFrequency ValuesBass60 to 250 HzLow midrange250 to 500 HzMidrange500 Hz to 2 kHzUpper midrange2 to 4 kHzAudio Spectrum Explained – Teach Me Audio www.teachmeaudio.com › mixing › techniques › audio-spectrum

The audible frequency range for human ear is from 20Hz to 20,000Hz , as out of the given frequencies , only frequency of 50000Hz doesn’t lie in audible range , therefore it cannot be heard by human ear .

A low- frequency sound is about 500 Hz or lower. A high- frequency sound is about 2,000 Hz and higher. Intensity is measured in decibels (dB) [DES-uh-buls].