Logt Audio - Hearing and Psychoacoustics

Psychoacoustics - Timbre and Pitch

The smallest degree of pitch discrimination between two pitches depends on their intensity and frequency range. Under the best conditions, a person with good hearing can discriminate about 1400 different pitches, of which 120 are used in the western scale of equal temperament. The lowest pitch corresponds to the lowest frequency giving a sensation of, around 20 to 30 Hz. The highest pitch depends on the highest audible frequency, which varies with age and especially noise exposure, but lies generally in the range of 15 to 20 kHz with younger people. ...

MP3 engineering and psychoacoustics

MP3 is something to give a certain amount of attention. MP3 is especially to be used for portable systems or internet applications. The source material is compressed by stripping audible musical information in order to decrease the required data storage capacity. At reproduction the data is decompressed for further processing. Besides the bitrate used for sampling the data, psychoacoustic models are used to reduce the redundant information in music. The current codecs for MP3 use such optimized algorithms that only strips those sounds that are otherwise also not audible...

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