Critical bandwidth rises above 500 Hz, matching the 5-Bark reference point.

Evidence

White noise shows a rise of IG/Io above 5 Bark because critical bandwidth increases above 500 Hz (5 Bark). Narrow-band noise, one critical band wide, is indicated in this drawing by a triangular shape with a base of 2 Bark. This is so because a window of I-Bark width starts to collect intensity if moved from low to high z-values when its centre is 0.5 Bark left of the limit of the critical-band wide noise. The peak of the triangularly shaped area corresponds to the total intensity, which is also reached by the white noise at exactly this value. This coincidence indicates that the width of the narrow-band noise is exactly one critical band wide. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 961

Categorization

Category: Causal Relationships

• DEFINE: Explains the critical-band-rate transformation and why critical bandwidth grows above 5 Bark.

Related

• White noise’s critical-band intensity rises above 5 Bark because bandwidth grows there (similarity 0.94)
• Critical bandwidth marks the point where noise loudness begins to grow with bandwidth (similarity 0.87)
• Critical bandwidth stays constant near 100 Hz up to 500 Hz then grows (similarity 0.86)
• Narrow-band noise produces substantial loudness in critical-band regions where no physical sound exists (similarity 0.84)
• Auditory critical bandwidth stays constant at 100 Hz below 500 Hz then rises proportionally. (similarity 0.84)
• Narrow-band noise sharpness grows proportionally with critical-band rate up to about 3 kHz (similarity 0.84)
• Above 500 Hz, critical-band rate grows logarithmically with frequency, roughly 20 percent per Bark. (similarity 0.83)
• Noise loudness is level-independent until bandwidth exceeds the critical bandwidth. (similarity 0.83)
• Critical bandwidth varies a hundredfold across the audible range. (similarity 0.83)
• Loudness rises with bandwidth beyond the critical band despite falling pattern height (similarity 0.82)
• Any sound narrower than a critical band produces identical loudness regardless of its width. (similarity 0.82)
• Phase-change sensitivity in hearing is bounded by critical bandwidth, scaling with centre frequency. (similarity 0.82)
• Critical bandwidth stays constant with masker level up to about 50 dB. (similarity 0.82)
• Widening a sound’s bandwidth beyond one critical band raises perceived loudness at unchanged intensity. (similarity 0.81)
• Critical band bandwidths grow from 100 Hz to over 2 kHz with frequency (similarity 0.81)