Sound volume control apparatus
A volume control and volume technology, applied in the direction of gain control, amplification control, transducer circuit, etc., can solve the problems of not taking into account listening to other sounds, not being able to feel pleasure, not taking into account auditory characteristics, etc.
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Deformed example 1
[0060] Although in the above-mentioned embodiment, the sound reproduction device 2 and the volume control device 3 are provided separately, the volume control device 3 may be installed in the sound reproduction device 2 so that the two become a single device. That is, an application software that realizes the function of the volume control device 3 may be installed on a device having an acceleration sensor and a sound reproduction function (for example, a smartphone, etc.). When the sound reproduction device 2 and the volume control device 3 are provided as a single device, the functions of both can be installed on the same circuit board, or the programs of both can be executed by the same CPU, so it can be easily implemented The volume adjustment control unit 324 outputs the sound reduction signal AS to the sound reproduction unit 22, and the sound reproduction unit 22 adjusts the volume of the reproduced sound in accordance with the sound reduction signal AS. In this example,...
Deformed example 2)
[0062] In the above embodiment, in order to easily implement the volume reduction process, the volume is reduced in the entire frequency range of the reproduced sound, but it is not limited to this. In other words, the volume may be reduced only in a part of the frequency range (volume reduction range) of the reproduced sound. At this time, the volume reduction process can be implemented by a circuit that combines a filter and an electronic volume. In addition, the volume reduction process can also be implemented by installing a program with FIR (Finite Impulse Response) filter function or DSP (Digital Signal Processor).
[0063] At this time, the volume reduction range is determined in consideration of the frequency components of the impact sound and the frequency characteristics of the masking level, that is, if the frequency difference caused by the masker (ie, reproduced sound) increases, the sound pressure decreases. Generally, in the impact sound, since the frequency compo...
Deformed example 3)
[0069] In the above-mentioned embodiment, the acceleration sensor 34 equipped on the waist of the user is used to detect the up and down transition movement in the swing movement of the golf club, but it is not limited to this. It is also possible to use various sensors (for example, motion sensors) that can be equipped in a predetermined part of the user to detect the up and down switching motion in the swing motion of the golf club. For example, an acceleration sensor or an angle sensor that can be equipped on the upper wrist or wrist of the user can be used. Alternatively, a pressure sensor that can be equipped on the golf glove of the palm of the user can be used.
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