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yetar
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How do you measure a sound wave loudness?
Thanks in advance.
Thanks in advance.
You would think so wouldn't you, but not quite. Loudness is usually quoted with a frequency since the ear does not perceive all frequencies equally. The phon and the sone are common units of loudness, although I believe the sone is the standard unit, but I could be wrong.Mk said:In dB I think.
Most conventional studies are indeed done in dB. However, the ear's interpretation of sound requires the altering/filtering of the source measurements. Hense the A, B, C and D weightings. The A weighting being the filter used most commonly and thus why most readings being quoted in dBA. Sones are used, but I think the dB rules supreme in this area.Hootenanny said:You would think so wouldn't you, but not quite. Loudness is usually quoted with a frequency since the ear does not perceive all frequencies equally. The phon and the sone are common units of loudness, although I believe the sone is the standard unit, but I could be wrong.
It's just a function of the amplitude:Is it an integral on the absolute value of the wave amplitude?
Sound wave loudness is measured using a unit called decibels (dB). This unit is a logarithmic scale that compares the sound pressure level of a sound wave to a reference sound pressure level. The louder the sound, the higher the decibel level.
The reference sound pressure level used for measuring sound wave loudness is 20 micropascals (µPa). This is the sound pressure level that is considered to be the threshold of human hearing at a frequency of 1000 Hz.
The loudness of a sound wave decreases as the distance from the sound source increases. This is because sound waves spread out as they travel, causing a decrease in sound intensity. This decrease in intensity is known as the inverse square law, which states that the sound intensity is inversely proportional to the square of the distance from the source.
Yes, there is a maximum loudness that a sound wave can reach. This is known as the threshold of pain, which is around 130 decibels. At this level, the sound wave can cause physical discomfort and potential damage to the ears.
Sound wave loudness can be measured using a smartphone app. Many smartphones have a built-in microphone and apps that can measure decibel levels. However, it is important to note that these measurements may not be as accurate as those taken with specialized equipment.