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A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]
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A rule of thumb is that the louder the sound, the less time you should listen to it for. Exposure to loud music can lead to a range of hearing problems such as noise-induced hearing loss, tinnitus and hyperacusis. Here are some commonly quoted comparisons of sound levels: 0 dB(A) - the lowest sound level a person with normal hearing can detect [4]
In music, dynamic range describes the difference between the quietest and loudest volume of an instrument, part or piece of music. [49] In modern recording, this range is often limited through dynamic range compression , which allows for louder volume, but can make the recording sound less exciting or live.
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In the descending runs, the subject may continue to reduce the level of the sound as if the sound was still audible, even though the stimulus is already well below the actual hearing threshold. In contrast, in the ascending runs, the subject may have persistence of the absence of the stimulus until the hearing threshold is passed by certain amount.
White noise has a flat power spectrum. White noise is a signal (or process), named by analogy to white light, with a flat frequency spectrum when plotted as a linear function of frequency (e.g., in Hz).
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...