It is important to know the parameters of audio devices, especially when we are going to buy them. The fact that they give us this or that value, without knowing exactly what they refer to, can help us compare the values of two devices, but we cannot know how large this value is if we do not know what it means. For this reason, today we’re going to jump to the topic to explain what Sone is in audio.
What is Sone?
Sleep is a unit of volume, subjective perception sound pressure .The fact that it is subjective not a goal Unit rev very important because it means that it is not always measured in the same way as it depends on the perception of who is doing it. It is also important to know that doubling the perceived loudness doubles the Sone value.
Sleep is a unit of measure for noise, proposed by Stanley Smith Stevens in 1936 and still in use today. According to his definition, Sone is equivalent to 40 telephones (1 kHz tone at 40 dB SPL, which in turn is equivalent to the noise of a 1936 phone call). The scale of backgrounds coincides with decibels, but not in volume, so the scale of sounds is disproportionate.
Instead, the volume in sones is roughly a scale of sound power with an exponent of 0.3. With this scale, every time the volume is increased by 10 phonons (or 10 dB at 1 kHz), the volume in the Sones doubles.
Sone is, as you can imagine, and, as we said, a subjective scale for measuring the sound pressure that a device emits or is capable of emitting (as this also applies, for example, to amplifiers, which denote the maximum volume that they are capable of generating ). If the frequency of 1 kHz used for measurement changes, it is necessary to calibrate the sound level based on the response frequency of human hearing, and for this reason this value is usually not used in many devices except for very specific and mostly professional models.
How are these units used?
As we already explained, sones are a unit of measure for volume. Loudness is a subjective characteristic of sound (as opposed to sound pressure level, which can be measured in pascals or decibels, objective and measurable values). Therefore, the loudness scale is based on data from subjects who were asked to rate the loudness of pure tones and noise.
Sona, therefore, is arbitrarily set, and corresponds to the perceived loudness with a tone at 1 kHz at an audio level of 40 dB above the standard reference level (i.e., the minimum audibility threshold). A sound at a volume of four sounds is a sound that listeners will hear four times louder than a reference sound.
Therefore, the use of this sound unit is usually purely informative so that the user can have a reference when purchasing the two quantities, and although it is not measurable, it can be extrapolated to scales measured in pascals or dB. ,