Patent ID: 8942836
Filing Date: 2015-01-27
Classification: G10K

Abstract:
1. A sound effect generating device including: traveling state detecting means for detecting a traveling state of a mobile body; a waveform data table for storing one period of waveform data; reference signal generating means for generating a reference signal of a certain order by successively reading the waveform data from the waveform data table based on the traveling state; acoustic control means for generating a control signal based on the reference signal; gain adjusting means for storing a first gain table, which stores a gain for the control signal in association with the traveling state, reading the gain from the first gain table depending on the traveling state, which is detected by the traveling state detecting means, and outputting the control signal, which is adjusted in gain using the gain; and sound effect output means for outputting a sound effect corresponding to the control signal, which is adjusted in gain, wherein the sound effect generating device further comprises: sound effect detecting means, disposed in an evaluating position near a passenger for detecting the sound effect at the evaluating position; gain comparing means for storing a second gain table, which stores a predicted gain for the control signal at the evaluating position, the predicted gain representing the gain for the control signal in the first gain table as reflecting a signal transfer characteristic from the sound effect output means to the sound effect detecting means, and comparing the predicted gain and a measured gain of the sound effect, which is detected by the sound effect detecting means; and gain correcting means for correcting the gain for the control signal, which is adjusted in gain, based on the result of the comparison from the gain comparing means, wherein the gain comparing means compares the predicted gain and the measured gain. with each other at a specified, frequency where a difference sound volume level of a sound between when the sound effect generating device is in operation and when the sound effect generating device is not in operation shows a local maximal value, from among control frequencies for the control signal; or the gain correcting means corrects the gain for the control signal at the specified frequency.