Audio device with volume adjusting function and volume adjusting method

摘要

An audio device and a volume adjusting method are provided. The audio device includes a speed sensor, a first FIFO buffer unit, and a second FIFO buffer unit. The audio device generates audio signals by playing multimedia files and stores audio signals to the first FIFO buffer unit. The audio device collects ambient sound signals and stores collected sound signals to the second FIFO buffer unit. The audio device further analyzes stored audio signals and sound signals to determine a waveform of environmental noise signals, and determines a SPL of the environmental noise signals according to the determined waveform. The audio device then compares the determined SPL with a preset SPL and compares the sensed speed with a preset speed if the determined SPL is greater than the preset SPL, and adjusts the volume of audio signals according to a comparison result between the sensed speed and the preset speed.

主权项

1. An audio device with a volume adjusting function, comprising: a speed sensor to sense a speed of the audio device;
a first first-in-first out (FIFO) buffer unit; a second FIFO buffer unit; an audio generator to play multimedia files to generate audio signals, and store audio signals to the first FIFO buffer unit; a sound collecting unit to collect ambient sound signals and store collected sound signals to the second FIFO buffer unit; a sound processing unit to analyze audio signals in the first FIFO buffer unit and sound signals in the second FIFO buffer unit to determine a waveform of environmental noise signals, and further determine a sound pressure level (SPL) of the environmental noise signals according to the waveform of environmental noise signals; and a volume controller to compare the determined SPL with a preset SPL, if the determined SPL is greater than the preset SPL, compare the speed sensed by the speed sensor with a preset speed, and increase the volume of audio signals to a first value if the sensed speed is greater than the preset speed, and decrease the volume of audio signals to a second value if the sensed speed is less than the preset speed.