JPH0321056Y2 - - Google Patents

Description

[Detailed description of the invention] This invention mixes the sound of a stereo microphone with the head-on output signal of an audio device such as an electric musical instrument, language teaching device, or stereo device, and generates a head-on output that can be heard by the head-on user as a head-on output signal. This relates to the microphone mixing device used.

BACKGROUND OF THE INVENTION Headphones used in audio equipment such as electric musical instruments, language teaching devices, and stereo equipment are designed to block outside sounds and allow only the output from the headphone to be heard. However, on the other hand, when outside sounds are blocked and cannot be heard at all, there is a drawback that it becomes impossible to respond to the sound of a telephone, a visitor's doorbell, a person's call, etc. In addition, conventional microphone mixers that mix the head-on output of a stereo amplifier, tape deck, walkman type tape recorder, etc. with the microphone output to produce a head-on output.
As shown in Figure 2, there are many devices that mix the outputs of line output 3 and microphone 8 and input the mixture to the line output, and this line input signal is amplified by intermediate amplifier 4 and power amplifier 5, and then output to speaker 6 and headphone. However, since external sounds were mixed with the original sound and then amplified, distortion occurred due to mixing and amplification, and the original sound was not output accurately.

In view of the above-mentioned shortcomings, the inventor of the present invention outputs the head-on signal of a stereo device or an electric musical instrument as it is to the head-on output, and mixes the head-on signal with a signal obtained by amplifying the microphone signal. We have developed a microphone mixing device that utilizes head-on output and can input head-on output signals to the head-on without distortion due to amplification.

An example of implementing the present invention will be explained in detail below with reference to the drawings.

1 is a phono input from an audio device such as an electric musical instrument, a language teaching device, or a stereo device, which is amplified by an equalizer amplifier 2, mixed with a line output 3, and further amplified by an intermediate amplifier 4 and a power amplifier 5. It has a structure in which the output leveling the speaker 6.

The headphone output signal branched from the speaker output is directly output to the headphone 7 when there is no external sound such as a telephone ringing or a person calling. If there is an external sound such as the sound of a telephone ringing or the sound of a visitor's doorbell, the microphone 8 captures this and amplifies it as a microphone output with a mixing amplifier 9 which amplifies it to the level of the headphone output signal. The output signal is mixed with the headphone output signal and output to the headphone 7.

As described above, the present invention amplifies the phono input 1 from audio equipment such as electric musical instruments, language teaching equipment, stereo equipment, etc. with the equalizer amplifier 2, mixes the amplified signal with the line output 3, and mixes the amplified signal with the line output 3. An audio device that outputs an output signal amplified by an amplifier 5 as a speaker output signal to a speaker 6, characterized in that the amplified microphone output signal is connected to mix the head-on output signal branched from the speaker output. It is.

As described above, the head-on output microphone mixing device according to the present invention amplifies the phono input from an audio device such as an electric musical instrument, a language teaching device, or a stereo device, and directly outputs the phono input to the head-on 7, so that a microphone signal is generated. In this case, the microphone signal is amplified and mixed with the head-on output, and since the head-on output signal of the stereo amplifier is output as is to the head-on 7, there is almost no distortion in the sound due to mixing or amplification. The amplifier section only needs to amplify the microphone input signal, consumes less power and can use batteries, and has advantages such as being able to hear surrounding sounds as natural sounds.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one example of implementing the present invention.
FIG. 2 is a block diagram of a conventional example. Main symbols in the diagram: 1...phono input, 2...equalizer amplifier, 3...line output, 4...intermediate amplifier, 5...power amplifier, 6...speaker, 7...headphone, 8...microphone , 9...Amplifier.

Claims (1)

[Scope of utility model registration request] The phono input 1 from an audio device such as an electric musical instrument, language teaching device, or stereo device is amplified by an equalizer amplifier 2, the line output 3 is mixed with the amplified signal, and the output signal amplified by an intermediate amplifier 4 and a power amplifier 5 is output. This microphone mixing device uses a head-on output, which is connected to mix an amplified microphone output signal with a head-on output signal branched from the speaker output in an audio device outputting the speaker output signal to a speaker 6.