"VOL" is an abbreviation for "volume." In vehicles, it's primarily used to adjust the volume of the audio system. There's a distinction between "VOL+" and "VOL-"; "VOL+" increases the volume, while "VOL-" decreases it.
Its usage is straightforward. According to one's preference, simply adjust the "VOL+/VOL-" knob to modify the volume. Some current car models have positioned the "VOL" controls on the steering wheel instead of the central console. The advantage of this is convenience; during driving, drivers don't have to search among many buttons on the central console, enhancing safety to some degree.
It's worth noting that many drivers, in an attempt to make music sound more immersive, might crank up the vehicle's volume. It's not particularly advisable to do so. The cabin of a car differs significantly from a room; it's akin to a resonating chamber for a speaker. Excessively loud audio can cause irreversible damage to the ears. In severe cases, it might even impair hearing. Therefore, it's essential to keep the volume moderate and avoid excessive loudness.
Moreover, if one wishes to make the music sound richer, it's not always about increasing the volume. Human ears are generally more sensitive to mid-frequency sounds and less so to high and low frequencies. To make music more engaging, one can lean towards the mid-frequency range. Cars often come equipped with a "LOUD" button, a feature that adjusts the equal loudness of the music. Using it properly can make the music feel more immersive. Additionally, this button can enhance the audio system's resistance to interference. It can counteract noise from the engine and tires, thus enhancing the musical experience while driving.
