Horn loudness adjusting method based on equal-loudness curve

Abstract

The invention relates to a horn loudness adjusting method based on an equal-loudness curve, which belongs to the field of horns and comprises the following steps: S1, a signal source sends a sound signal to a digital signal processor; s2, the digital signal processor preprocesses the received sound signal and sends the sound signal to a power amplifier, and the power amplifier amplifies the obtained sound signal and sends the sound signal to a loudspeaker to enable the loudspeaker to make a sound, wherein, in the step S2, the digital signal processor preprocesses the received sound signal, including detecting the sound pressure level and the frequency of the sound signal, analyzes and compares the sound pressure level and the frequency of the sound signal according to the equal-loudness curve, not processes the sound signal if the sound signal is located in an audible threshold, and improves the loudness of the sound signal by using a digital signal processor if the sound signal is located outside the audible threshold, so that the sound signal is located in the audible threshold. According to the invention, the loudness of the loudspeaker can be adjusted to improve the user experience.

Description

technical field [0001] The invention relates to the field of speakers, in particular to a loudspeaker loudness adjustment method based on equal loudness curves. Background technique [0002] The human ear's perception of sound is not only related to sound pressure, but also related to frequency. Sounds with the same sound pressure level but different frequencies sound differently. For example, an air compressor and a chainsaw both have a sound pressure level of 100 decibels. It sounds like the chainsaw is much louder. According to the sensory characteristics of the human ear to sound, the subjective sound perception of the sound is determined according to the sound pressure and frequency, which is called the loudness level, and the unit is square. The human ear's perception of the loudness can be expressed by an equal loudness curve, such as figure 1 As shown, the equal loudness curve refers to the curve of the relationship between the sound pressure level and the frequen...

AI Technical Summary

Problems solved by technology

According to the sensory characteristics of the human ear to sound, the subjective sound perception of the sound is determined according to the sound pressure and frequency, which is called the loudness level, and the unit is square. The human ear's perception of the loudness can be expressed by an equal loudness curve, such as figure 1 As shown, the equal loudness curve refers to the curve of the relationship between the sound pressure level and the frequency of a pure tone that a typical listener feels the same loudness. The area above the minimum audible threshold curve is the audible threshold, and the sound below the audible threshold curve cannot be felt by the human ear, so that the human ear cannot feel the low-frequency sound, and the user experience is poor. Therefore, there is an urgent need for an adjustable speaker in this field. method of loudness

Images