JPH01186008A - Low frequency sound emphasis circuit - Google Patents

Abstract

PURPOSE:To generate a high-order partial sound forcibly and to output a low frequency sound component from a speaker as a sound with sharp contour in the sense of listening by distorting a low frequency sound to generate harmonics, adding the harmonics with are original music signal at a power amplifier. CONSTITUTION:A voice signal is branched, one is given to one input terminal of a power amplifier having two input terminals, and the other is inputted to an LPF 3. Only a low sound component of an audio signal inputted to the LPF 3 passes therethrough. The low sound component of the passed audio signal is amplified by the power amplifier 5 and distorted in a distortion generator 4. The distorted low frequency sound component is given to the other input terminal of the power amplifier 1, added to the original audio signal, and the result is amplified and outputted. Through the constitution above, a sharp low sound ease of listening is obtained from the speaker.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bass emphasis circuit for enhancing bass components of an audio signal.

Background of the Invention In recent years, the development of compact discs and the improvement in the quality of cassette tapes has expanded the dynamic range of the low frequency range of audio signals, and there has been a demand for audio equipment with improved ability to reproduce bass components. There is.

An example of a conventional bass emphasis circuit will be described below with reference to the drawings. FIG. 3 shows a conventional bass emphasis circuit, in which 1 is a power amplifier and has two inputs. 2 is a resonator that changes the impedance in the low frequency band.

The operation of the bass emphasis circuit configured in this manner will be described below.

First, an audio signal is input to one input terminal of the power amplifier 1, which has two input terminals. Next, the signal whose impedance in the low frequency band has been changed by the resonator 2 is inputted to the other input terminal of the power amplifier 1. Then, the audio signal input from one side has a frequency characteristic corresponding to the impedance change curve of the signal input from the other side, and the bass component is emphasized and output. Note that the frequency of the bass tones that is emphasized is around 1ooH, as shown in FIG.

Problems to be Solved by the Invention However, with the above configuration, the bass tones that should be emphasized,
In other words, only the low-order partials of the 1001-4z/9 bass instrument sound component included in the audio signal are emphasized, and the high-order partials outside the impedance change curve generated from resonator 2 are emphasized. is not emphasized.

In general, one sound in speech can be considered to be broken down into several sounds with different frequencies from the fundamental tone, and these sounds including the fundamental tone are called partials, and partials are lower-order partials with respect to the fundamental tone. It is said that a sound with strong tones will have a rich and wide tone, and conversely, a sound with stronger high-order partials will have a hard and sharp feel. Therefore, with the above configuration, there is a problem in that the bass component output from the speaker becomes a sound that is difficult to hear without any resonance.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a bass emphasizing circuit capable of outputting a bass component from a speaker as a sound that is aurally clear and easy to hear.

Means for Solving the Problems In order to solve the above problems, the bass emphasis circuit of the present invention distorts the bass component to create harmonics, and the original music signal and
It is configured to add and amplify using a power amplifier.

Function The present invention makes it possible to create harmonics of the bass component with the above-described configuration, forcibly generates high-order partials, and makes the bass component clear and easy to hear. It can be output as sound from a speaker.

Embodiments Below, bass emphasis circuits according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a bass emphasis circuit according to an embodiment of the present invention.

In FIG. 1, 1 and 6 are power amplifiers, 3 is a low-pass filter, and 4 is a distortion generator.

The operation of the bass emphasis circuit configured as described above will be explained below with reference to FIG.

First, the audio signal is branched, one into one input of a power amplifier 1 having two inputs, and the other into a low-pass filter 3. Only the bass components of the audio signal input to the low-pass filter 3 are passed through. The bass component of the audio signal that has passed through the low-pass filter 3 is amplified by a power amplifier 5 and then distorted by a distortion generator 4. The bass component distorted by this distortion generator is input to the other input terminal of the power amplifier 1, added to the original audio signal, and then amplified and output.

In this way, according to the present embodiment, by distorting the bass component and creating harmonics, high-order partials are forcibly generated, and the bass component is audibly distorted. Clear sound can be output from the speaker. The frequency characteristics at this time are as shown in FIG.

Effects of the Invention As described above, the present invention distorts the extracted bass component to create harmonics, adds them to the original audio signal, and amplifies them, thereby forcibly generating high-order partials. Bass components can be output from the speaker as audibly clear sound.

[Brief explanation of the drawing]

FIG. 1 is a 10-step diagram showing a bass emphasis circuit according to an embodiment of the present invention, FIG. 2 is an output frequency characteristic diagram of the same circuit, and FIG.
The figure is a block diagram of a conventional bass emphasis circuit, and FIG. 4 is an output frequency characteristic diagram of the circuit. 1.5...t increase! ! , 3...Low pass filter, 4...Distortion generator. Name of agent: Patent attorney Toshio Nakao and 1 other person 4-
-Ichikacho) 1 plate Fig. 2 Fig. 3 Fig. 71--Power increase IfAX Fig. 4＼

Claims (1)

[Claims] A low-pass filter extracts bass components from an audio signal, a distortion generator distorts the bass components extracted by the low-pass filter to create harmonics, and the output of this distortion generator and the original audio signal are combined. A bass emphasis circuit characterized by comprising a power amplifier that adds and amplifies.