JPH0724876Y2 - Audio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an audio device, and more particularly to an audio device including a heavy bass reproduction circuit, a so-called super woofer circuit.

<Prior art> In recent years, in audio equipment, for example, a tape recorder with a radio, apart from a stereo reproduction circuit using left and right main speakers, that is, a so-called main reproduction circuit, only a low-frequency component of an audio signal is enhanced and a dedicated speaker It is equipped with a heavy bass reproduction circuit that outputs deep bass, allowing you to experience powerful sounds. In such a tape recorder with a radio, a volume dedicated to heavy bass is provided for adjusting the output level of the deep bass.

<Problems to be solved by the invention> However, in such a conventional audio device, when the heavy bass is reproduced by the heavy bass reproduction circuit, the low frequency component of the reproduced sound by the main reproduction circuit and the deep bass by the heavy bass reproduction circuit are generated. May overlap each other and interfere with each other to deteriorate the sound quality. Especially, when the output level of the deep bass is increased by the volume for the deep bass, the tendency is increased.

The present invention has been made in view of the above points, and an object of the present invention is to provide an audio device in which deterioration of sound quality does not occur during heavy bass reproduction.

<Means for Solving the Problems> In the present invention, in order to achieve the above object, a main reproduction circuit for reproducing an audio signal of a main channel and a heavy bass reproduction circuit for extracting and reproducing a deep bass component from the audio signal. In the audio equipment including, the variable means for varying the reproduction frequency characteristic of the heavy bass reproduction circuit in accordance with the operation of the heavy bass volume for adjusting the level of the deep bass output from the heavy bass reproduction circuit is provided.

<Operation> According to the above configuration, for example, by changing the reproduction frequency characteristic as the output level of the heavy bass is increased by the volume for heavy bass to lower the cutoff frequency of the heavy bass, the sound from the main reproduction circuit is reduced. It is possible to reduce the deterioration of the sound quality due to the interference with the deep bass from the deep bass circuit.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an essential part of an embodiment of the present invention. In this embodiment, description will be made by applying it to a tape recorder with a radio.

This radio tape recorder includes a main reproduction circuit 1 for reproducing a main channel audio signal, and a heavy bass reproduction circuit 2 for extracting and reproducing a deep bass component from the audio signal. In FIG. 1, the main reproduction circuit 1 shows only one channel for simplification.
The audio signal of the other channel (not shown) is also supplied to the heavy bass reproduction circuit 2.

The level of the audio signal given through the input selector switch 3 for switching the sound source to the radio or the tape is adjusted by the volume adjusting volume 4, and the main reproducing circuit 1
And the bass reproduction circuit 2.

The main reproduction circuit 1 includes a main amplifier 5 and a main speaker 6.

The deep bass reproduction circuit 2 includes a CR type low-pass filter 7 that cuts out the mid-high range of an audio signal to extract a deep bass component, a deep bass volume 8 that adjusts the level of the deep bass from the low pass filter 7, It includes a bass amplifier 9 and a heavy bass speaker 10.

In the tape recorder with a radio of this embodiment, when the low-pitched sound is reproduced, it is prevented that the low-frequency component of the reproduced sound by the main reproducing circuit 1 and the low-pitched sound by the low-pitched sound reproducing circuit 2 are overlapped with each other and the sound quality is deteriorated. For deep bass volume 8
The reproduction frequency characteristic of the heavy bass reproduction circuit 2 is changed according to the operation of. That is, the low-pass filter 7
Is provided with a low-pass filter volume 11 as a varying means for varying the cut-off frequency of the low-pass filter 7 in conjunction with the operation of the deep bass volume 8, and a resistor 12 and a capacitor 13.

In the heavy bass reproduction circuit 2, when the heavy bass volume 8 is operated to adjust the output level of the deep bass, the low pass filter volume 11 of the low pass filter 7 is interlocked with it.
Works, which allows the low pass filter volume
The cutoff frequency determined by the time constant of the combined resistance of 11 and the resistor 12 and the capacitor 13 changes.

FIG. 2 is a diagram showing a reproduction frequency characteristic of the tape recorder with a radio having the above-mentioned configuration, where A is the main reproduction circuit 1
, And B1, B2, and B3 represent the reproduction frequency characteristics of the heavy bass reproduction circuit 2 corresponding to the adjustment of the heavy bass volume 8.

As shown in FIG. 2, when the heavy bass volume 8 is adjusted to increase the output level, the low-pass filter 7
The cut-off frequency of 1 is changed to the lower side, whereby it is possible to prevent the reproduced sound from the main reproduction circuit 1 and the deep bass from the heavy bass reproduction circuit 2 from overlapping and deteriorating the sound quality.

<Effects of the Invention> As described above, according to the present invention, in an audio device including a main reproduction circuit for reproducing a main channel audio signal and a heavy bass reproduction circuit for extracting and reproducing a deep bass component from the audio signal, The heavy bass reproduction circuit is a low-pass filter for cutting out the mid-high range of the audio signal to extract a heavy bass component, and a heavy bass operated for adjusting the output level of the heavy bass component extracted by the low-pass filter. A low-pass filter, wherein the low-pass filter changes the cut-off frequency of the low-pass filter to a lower side in conjunction with an operation of increasing the output level of the heavy-low tone component of the heavy-low tone volume. Since it is equipped with a volume control for deep bass to suppress the powerful sound sense When the output level is adjusted to a low level, it is less likely that heavy bass will overlap with the sound played back by the main playback circuit, resulting in deterioration of sound quality.In this case, raise the cutoff frequency of the heavy bass component. By setting it, you can prevent the deep bass component from being damaged, and if the output level of the deep bass component is adjusted to a high level with the deep bass volume to give a powerful sound sensation, it will be reproduced by the main playback circuit. There is a risk that the deep bass will overlap and interfere with each other, resulting in deterioration of the overall sound quality.Therefore, lowering the cutoff frequency effectively reduces the sound quality while enjoying a powerful sense of sound. Can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram of an essential part of an embodiment of the present invention, and FIG. 2 is a reproduction frequency characteristic diagram of FIG. 1 ... Main playback circuit, 2 ... Deep bass playback circuit, 8 ...
Volume for heavy bass.

Claims (1)

[Scope of utility model registration request] 1. An audio device comprising a main reproduction circuit for reproducing an audio signal of a main channel and a heavy bass reproduction circuit for extracting and reproducing a deep bass component from the audio signal, wherein the heavy bass reproduction circuit comprises: A low-pass filter for cutting the mid-high range and extracting the deep bass component,
A volume for heavy bass operated to adjust the output level of the heavy bass component extracted by the low-pass filter, the low-pass filter, the output level of the heavy bass component of the volume for heavy bass An audio device comprising a low-pass filter volume for changing the cut-off frequency of the low-pass filter to a lower side in association with an operation of increasing it.