JPH062175U - Tuner - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is for detecting the pitch of a tuning device.
Minimize the effects of ambient noise and detect the pitch of the target instrument sound more accurately. [Structure] A signal level of a signal from a sound detector 1 such as a microphone is provided with a variable circuit 2 to set the signal to an appropriate level.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a musical instrument tuning device.

[0002]

[Prior art]

 Conventionally, this type of tuner has detected the pitch of a musical instrument sound by amplifying the signal from the sound detecting means at a constant level or as much as possible.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, the signal from the sound detection means such as a microphone is set to a constant level to detect the pitch of the musical instrument sound. The pitch of the target instrument sound may not be detected accurately depending on the factors of the volume of the musical instrument sound that detects the pitch, the amount of ambient noise, and the distance between the instrument that detects the pitch and the sound detector. There was a challenge called Lei.

The object of the present invention is, in order to solve such a conventional problem, a loudness of a musical instrument sound for detecting a pitch, a loudness of ambient noise, and a distance between a musical instrument and a sound detector for detecting a pitch. According to the above, a circuit for varying the signal level of the pitch detection signal from the sound detector such as a microphone is provided, and by setting the signal to an appropriate level, the pitch of the target instrument sound can be accurately detected. Especially.

[0005]

[Means for Solving the Problems]

 The present invention has been devised to solve the above-mentioned problems, and its means comprises a circuit for varying the signal level of a signal from a sound detector such as a microphone.

[0006]

[Action]

 In the above configuration, when detecting the pitch of the tuning unit, in order to minimize the influence of ambient noise and detect the pitch of the target musical instrument sound more accurately, the loudness of the musical instrument sound and the magnitude of the ambient noise are detected. By providing a means for varying the signal level of the signal from the sound detector according to the distance between the instrument and the sound detector and setting the signal at an appropriate level, the pitch of the target instrument sound is Enabled to detect accurately.

[0007]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of the present invention. In FIG. 1, 1 is a sound detector, 2 is a signal level variable circuit, 3 is a pitch detector, and 4 is a display. The sound detector 1 is a converter that converts sound such as a microphone into an electric signal. The signal level varying circuit 2 is a circuit for varying the level of the signal from the sound detector 1.

FIG. 2 is a signal level variable circuit diagram. 2, 5 is an amplifier, 6 is a variable resistor, 7, 8 and 9 are resistors, and 10 is a capacitor. The signal level of the signal 11 from the sound detector 1 is changed by the variable resistor 6 shown in FIG. 2 and output as a signal 12 to the pitch detecting section 3. The resistor 7 determines the minimum value of the signal level, but can be omitted in some cases. Also, the signal level variable circuit 2 can be configured by a resistor and a switch, or an attenuator having only a variable resistor. The pitch detection unit 3 receives the signal 12 and searches for a pitch, and is composed of a reference signal generation circuit, a comparator, a note name search circuit, an octave search circuit, a cent value calculation circuit, and the like. The display section 4 is a section for displaying the pitch detected by the pitch detection section 3, and is constituted by a display device such as a meter, an LED and an LCD. The operations of the pitch detection unit 3 and the display unit 4 are the same as those of the conventional tuning device, and therefore their explanations are omitted.

[0009]

[Effect of device]

 As described above, according to the present invention, by the variable circuit of the signal level of the signal from the sound detector, even if there is noise in the surroundings, the loudness of the musical instrument sound for detecting the pitch, the loudness of the surrounding noise, By setting the signal at an appropriate level according to the factors of the pitch detecting instrument and the distance of the sound detector, the pitch of the target instrument sound can be accurately detected.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a signal level variable circuit diagram of the present invention.

[Explanation of symbols]

 1 sound detector 2 signal level variable circuit 3 pitch search unit 4 display unit 5 amplifier 6 variable resistor 7, 8, 9 resistor 10 capacitor

Claims (1)

[Scope of utility model registration request] 1. A tuning device for detecting a pitch of a sound of a musical instrument and displaying the pitch, the tuning device amplifying only a signal level from the sound detecting means for extracting the sound as an electric signal and a signal level from the sound detecting means. A tuning device comprising: a signal level varying means for controlling the pitch of the sound; and a pitch detecting section for detecting the pitch of the sound.