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US 8,045,723 B2Granted
Active sound effect generating apparatus
AssigneeHonda Motor Co., Ltd.
InventorsYasunori Kobayashi, Toshio Inoue, Akira Takahashi, Kosuke Sakamoto
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Abstract
An active sound effect generating apparatus includes a controller (a fourth acoustic adjuster and a fifth acoustic adjuster) which determines the amplitude of a control signal by adjusting the amplitudes of reference signals (intermediate signals) depending on an engine rotational frequency change [Hz/second] calculated by an engine rotational frequency change calculator and an accelerator opening [%] detected by an accelerator opening sensor.
Claims8
An active sound effect generating apparatus comprising:
- a waveform data table for storing one period of waveform data;
- a rotational frequency detector for detecting the rotational frequency of an engine;
- a reference signal generator for generating a harmonic reference signal based on said rotational frequency by reading said waveform data successively from said waveform data table;
- a controller for generating a control signal to generate a sound effect based on said reference signal;
- an output unit for outputting said sound effect based on said control signal;
- a rotational frequency change calculator for calculating a rotational frequency change which represents a change per unit time in said rotational frequency;
- and
- an engine load detector for detecting a load on the engine;
- wherein said controller determines an amplitude of said control signal by adjusting an amplitude of said reference signal depending on said rotational frequency change and said load on the engine.
6 more elements
Dependencies are inferred from the claim text.