![]() ![]() The LU does not normalize audio to its peak levels rather, this measure normalizes sound only up to a certain volume of loudness as perceived by human ears. LUFS fixed this problem by permitting podcast sound normalization. In the past, a listener would have to adjust their volume depending on whether music was playing or the host was talking. Why should professional quality podcasts use LUFS over decimals when adjusting loudness? This standard applies a high-frequency boost to inconsistent audios, making them more suitable to human ears. Momentary readings in LUFS are adjusted according to the Fletcher-Muson Curve. With any other standard normalizer, the same audio will shift in volume each time the peak reaches a certain level. Therefore, an audio file with loud, momentary peaks will have a consistent volume within a LUFS algorithm as they do not affect the long-term average. LUFS takes into account the average loudness of podcasts over an extended period of time. Most normalization tools measure only at the peak points of audio. How is Loudness Unit Full Scale measured? This scale reports all audio intensities as logarithmic ratios relative to the reference intensity. The decibel scale is thus logarithmic in nature and uses the standard intensity of 1×10–12 as a reference point. The relationship between sound intensity that hits the eardrums and its perceived loudness is not linear. A Loudness Unit does not require a reference to measure the same loudness. Second, a decibel uses standard air pressure as a reference point in measuring the intensity of sound. A Loudness Unit upholds the consistency of the resulting volume from the audio. First, a decibel simply quantifies the amount of air pressure displaced by a sound. Loudness Units differ from decibels in a number of ways. Amplifying audio by 2dB is the same as raising its volume by 2 Loudness Units. In practical applications, LUs are equal to decibels. LUFS is a newer standard for measuring loudness and is considered as the most accurate. Despite the difference in names, these two are exactly alike as they describe the same phenomenon of measuring loudness. This standard is also referred to some as LUFS (Loudness K-weighted Full Scale). The LUFS meter ( Loudness Unit Full Scale) measures the perceived loudness of audio material. What does LUFS even stand for and what does it measure? ![]() ![]() The decibel scale quantifies the different levels of sound in a more meaningful, manageable, and measurable way. As it grows in volume, sound displaces more and more air pressure and that is what people characterize as loudness. However, a decibel is not an absolute level or unit of sound it represents the amount of air pressure that the sound creates. At a frequency of 1 KHz, the smallest sound that human ears can detect has an objective volume of 0 dB. What exactly is a decibel?Ī decibel (abbreviated dB) is the unit of measurement for the intensity of sound. The TL DR for those looking to know if they should use LUFS or decibels to measure loudness is… Use LUFS over decibels when adjusting audio loudness and for podcasts set your loudness to -16 LUFS. Find out if LUFs or decibels be used for sound measurement of loudness in your podcast and learn the difference between the two forms of measurement Short version for podcast producers, editors, and/or mixers ![]()
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