A 1 dB level change anchors the model for just-noticeable slow sound variations
Evidence
The filled square shown in Fig. 7.3 belongs to the broadest possible critical band (3.5 kHz) at the upper end of the audible frequency range, and to a sound level change of 1 dB corresponding to a sinusoidal 4-Hz amplitude modulation of 6%. This level change of 1 dB plays a dominant role in the model for just-noticeable sound variations of slow rate. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1031
Categorization
Category: Factual Claims
- XREF: This 1 dB anchor foreshadows the central model of loudness perception covered later in the book as level increments.
Related
- A 1 dB level change anchors the model of just-noticeable slow variations. (similarity 0.97)
- A 1 dB level change marks a recurring just-noticeable unit in hearing (similarity 0.87)
- Hearing becomes less sensitive to frequency variations as level increases (similarity 0.85)
- Just-noticeable amplitude modulation drops steeply as tone level rises (similarity 0.85)
- Humans detect level changes of about 1 dB at moderate volumes (similarity 0.84)
- The just-noticeable difference quantifies the smallest audible change in a sound (similarity 0.84)
- The ear’s amplitude sensitivity varies with loudness and tonal complexity (similarity 0.84)
- Bass frequencies need far smaller level changes to halve perceived loudness (similarity 0.83)
- Detecting level variation is about 2.5 times harder than detecting level difference (similarity 0.83)
- Just-audible image displacement needs only 1 to 2 dB level change. (similarity 0.82)
- Sharpness changes little with level and bandwidth below one critical band. (similarity 0.82)
- Just-noticeable amplitude modulation of noise shrinks from 40% to 6% as bandwidth widens. (similarity 0.82)
- Practical sound fluctuation models substitute specific-loudness differences for masking-depth values (similarity 0.82)
- The ear’s just-noticeable amplitude difference depends on signal type, level, and frequency (similarity 0.82)
- Doubling sound level from 30 to 90 dB only doubles perceived sharpness (similarity 0.82)