JPH0242498A - Whistle sound detecting system - Google Patents

Abstract

PURPOSE:To give selectivity to whistle information and to effectively prevent the malfunction of a voice message output device, etc., by measuring the duration length from the power of a whistle sound, coding the whistle sound in accordance with its length and comparing it with conditions set beforehand. CONSTITUTION:The title system is provided with a means 8 to measure the duration length of the intermittently generated whistle sound from the power of the whistle sound detected through a band-pass filter 2 and encode the intermittently generated whistle sound in accordance with the length of the duration length, and a means 8 to obtain a signal output when the information about the encoded whistle sound satisfies the conditions set beforehand. Thus, the intermittently generated whistle sound is encoded in accordance with the length of the duration length, the signal output is controlled by whether or not the information satisfies the condition set beforehand and therefore, the malfunction can be effectively avoided.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is based on a whistling sound detection method (conventional technology ) Recently, whistling sound detectors and speech synthesizers have been incorporated into key chains and watches, and when whistling sound is detected, IBI 11
Products have been developed that output t voice messages. Specifically, when you whistle, it detects the whistle and outputs a voice message such as "Here's your keychain." A product (for example, a key chain) with such a function has the advantage of making it possible to easily locate a key (key chain) that has been left behind somewhere in the house using a whistle.

This type of device has a microphone 1 as shown in FIG.
A whistling sound manually inputted from a whistle is detected through a bandpass filter (BPF) 2 having predetermined frequency band characteristics, and a duration detector 3 detects its duration from the output of the bandpass filter 2. When a whistling sound lasting longer than a predetermined time is detected, the voice synthesizing section 4 is driven to output a predetermined voice message from the speaker 5.

However, devices with such a simple configuration often malfunction due to children's voices with similar frequency components or sounds from television receivers, etc., and a voice message is suddenly emitted from the key chain. Sometimes. Moreover, when multiple devices of the same type are in the same room, there are problems such as the whistles causing these devices to operate at the same time.

(Problem to be Solved by the Invention) In this way, the conventional device that detects a whistling stand and outputs a voice message, etc. merely detects a whistling stand that continues for a predetermined period of time. Therefore, it is unavoidable that the device may malfunction due to a child's voice, etc., and if there are multiple devices of the same type, there are problems such as all devices operating at the same time.

The present invention has been made in consideration of these circumstances, and its purpose is to provide a whistling sound detection method that can reliably operate only desired equipment using a whistling stand.

[Structure of the Invention] (Means for Solving the Problems) The present invention detects the whistle that is generated intermittently through a passive pass filter, and calculates the duration of the whistle from the whistle. The intermittently generated whistle was coded based on the length and shortness of the measurement, and a signal was output when the coded whistle information satisfied a preset condition. It is characterized by this.

(Operation) According to the present invention, the whistle that occurs intermittently is coded according to the length of its duration, and a signal is output depending on whether the coded information satisfies a preset condition. is controlled, so even if a child's voice is erroneously detected as a whistling stand, it will be possible to ensure that it matches the above conditions when encoded (as this is extremely rare, this error can be effectively avoided). Furthermore, by making the operating conditions (encoded information) different for each device of the same type, it is possible to prevent simultaneous operations.

(Example) Hereinafter, a whistling sound detection device constructed by applying this method will be described with reference to the drawings.

FIG. 1 is a schematic configuration diagram of the apparatus of the embodiment, where ■ is a microphone that detects and inputs a whistling stand, etc., and 2 is a band-pass filter (B P F). Reference numeral 4 denotes a voice synthesis section which outputs a predetermined voice message via the speaker 5 when a whistle stand is detected.

However, the feature of this lever device is as shown in Fig. 2(a).
As shown in Fig. 2(b), the whistling stand detected via the BPF 2 is detected by the detection circuit (DET) [i], and the envelope information is detected as shown in Fig. 2(b).
NT) 7, the fine fluctuation components in the above envelope information are
Absorb as shown in Figure (C). Thereafter, in accordance with the envelope information of the whistling stand that has been subjected to such pre-processing, the encoding processing unit 8 checks the duration of the whistling stand that is intermittently inputted from the microphone 1, and calculates the length of the time. The system is characterized in that the whistling stand that is input intermittently for 1 m is coded in accordance with the above, and it is determined whether or not it conforms to a preset detection condition.

To explain the encoding processing section 8, a rise differentiation circuit 11 differentiates the envelope information as shown in FIG. 2(d), and detects the rise timing of the envelope information. On the other hand, in the falling differentiation circuit 12, as shown in FIG.
As shown in c), the falling timing of the envelope line information is detected.

tlt stable? Luchi/<ia'L/-9 (MMV) 13
．． 14 uses the rising differential pulse as a trigger to generate gate signals with preset time widths Tl and T2 as shown in FIG. 2 (n(g)), and gate circuit 15
．． 16 respectively define the detection operation period of the falling differential pulse. Note that the gate circuit 15 receives the inverted output of the MMV 14 via the inverter 17, and the gate circuit 15
The operation is prohibited during operation. In the gate circuit 15° IG controlled in this way, there is a whistling stand that produces a beep for a long time (T1 x t≦T2), and a whistle stand that produces a short beep sound (0<t≦TI). are separated and detected as shown in FIGS. 2(h) and (i), respectively.

In addition, a counter (
CTR) 1g consists of a quaternary counter, whose Ql, Q
Two outputs control gate circuits 19, 20, 21 and 22, respectively. This counter 18 is reset by an AND circuit 24 that performs logical processing on its Q2 output and the output of a falling differentiation circuit 23 that detects the falling timing of the MMV 13.
Each time the envelope rising differential pulse of the whistling stand from 1 is manually applied, Ql is
, turn on the Q2 output alternately.

Under the control of the counter 18 operating in this manner, the length information detected by the gate circuit 15-16 of the whistling stand that is input for the first time is sent to the flip-flop 25 via the gate circuit 19-20 as shown in FIG. It is set as shown in 1). Further, the length information detected by the gate circuit 15.16 of the whistling stand inputted the second time is set in the flip-flop 2G via the gate circuit 21.22 as shown in FIG. 2(m).

Furthermore, the flip-flops 25 and 26 are set to "1°" when a whistling stand with a long time length such as "Beep" is detected, and "0" when a whistling stand with a short time length of "Picco" is detected. .

However, exclusive OR circuit (EX-OR)
27, 28 are the information set in the flip-flops 25, 26, respectively, and the switches 29, 301. : Exclusive OR with each preset information is calculated, and the output is outputted via the AND circuit 31 at the reset timing of the counter 18 as shown in FIG. 2(n). ing. That is, the switches 29 and 30 are fixedly set in advance by the user, and depending on the ON state, the EX-OR 27,
Data of "1" or "0" is given to each of the terminals 28 in a preset manner. The data thus preset and the flip-flops 25 and 26
The data set in each are subjected to exclusive OR processing. The logical sum output is then subjected to logical processing by an AND circuit 31 and used to generate a signal output for driving the speech synthesis section 4. As a result, depending on the set state of the switches 29 and 30, [beep, beep] [beep, beep]
[Beep, beep] The speech synthesis section 4 is driven according to the four whistling sound input forms: [beep, beep].

According to this device configured in this manner, by whistling a predetermined combination of length and shortness, instead of simply whistling, the combination of length and shortness of the whistling stand is coded, and the code is coded. A voice message will be emitted only when the converted whistle information matches a predetermined condition. In other words, even if a whistle input is detected via the BPF 2, if the human input mode does not meet the predetermined conditions, no voice message will be issued.

Therefore, according to this device, even if a child's voice or the like is erroneously detected as a whistle, it can prevent the z1 from being driven and effectively prevent a voice message from being erroneously output. becomes possible.

Furthermore, when there are a plurality of devices of the same type, by setting different encoding information to these devices, simultaneous operation can be effectively prevented. As a result, by simply changing the length of the whistle, great practical effects can be achieved, such as making it possible to reliably operate only the target device.

Note that the present invention is not limited to the embodiments described above. Here, the duration of the whistle is divided into two types, long and short, but it is also possible to divide it into three or more types. Also, here the combination is defined as a combination of two whistling stands,
Of course, it is also possible to encode the information as a combination of three or more whistles. In addition, the present invention can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] As explained above, according to the present invention, by simply changing the combination of the length and shortness of the whistling sound, it is possible to impart selectivity to the whistling information, and it is possible to effectively prevent malfunctions of voice message output devices, etc. This has great practical effects, such as being able to prevent this and ensure its operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a whistling sound detection device constructed by applying an embodiment method of the present invention, FIG. 2 is a diagram showing the operation timing of the embodiment device, and FIG. 3 is a configuration example of a conventional device. FIG. 2...Band pass filter (BPF), 4...Speech synthesis section, 6...Detection circuit, 7...Integrator circuit, 8...
- Encoding processing unit, 13. 14... Monostable multivibrator uVIMV), 15.16... Gate circuit, 18-... Counter, 25, 2G... Flip-flop, 27.28... Exclusive OR circuit, 29.3
0...Switch, 31...AND circuit. Applicant's agent Patent attorney Takehiko Suzue Figure 3

Claims (1)

[Claims] A band-pass filter detects the whistling sound that is generated intermittently, and the duration of the whistling sound detected through the band-pass filter is measured from the power of the whistling sound, and the intermittency is determined according to the length of the duration. Whistle sound detection characterized by comprising: means for encoding a whistling sound generated by a user; and means for obtaining a signal output when information on the encoded whistling sound satisfies a preset condition. method.