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Whismur (Japanese: ã´ãã§ãã§ Gonyonyo) is a Normal-type Pokemon pokÃ©mon introduced In GENERATION. Iii whismur evolves Into loudred starting at level 20 and gains the special, Ability. soundproof
The perception of loudness is related to both the sound pressure level (SPL) and duration of a sound. The human auditory system averages the effects of SPL over a 600â1000 ms interval. A sound of constant SPL will be perceived to increase in loudness as samples of duration 20, 50, 100, 200 ms are heard, up to a duration of about 1 second at which point the perception of loudness will stabilize.