JP2013001483A - Silencing system for passenger conveyer, and silencing method for passenger conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a comfortable announcement, even in noises from a plurality of noise sources.SOLUTION: A silencing system for a passenger conveyer includes a storage part (14) storing steady noise properties, intermittent noise properties, and unsteady noise properties by associating them with individual noise parameters; and a control part (10) which acquires the steady noise properties, intermittent noise properties, and unsteady noise properties separately for each individual noise parameter through a microphone 40 to store them in the storage part in advance, synthesizes the respective steady noise properties, intermittent noise properties, and unsteady noise properties taken from the storage part according to the noise parameters acquired during actual operation of the passenger conveyer to calculate specific noise, generates an inverse phase signal for silencing the calculated specific noise as a silencing signal, and outputs the silencing signal upon outputting an announcement.

Description

  The present invention relates to a silencing system for a passenger conveyor and a silencing method for a passenger conveyor for making a more comfortable announcement on an escalator, a moving walkway, and the like.

  A conventional system for broadcasting guidance for passenger conveyors is to compare the fixed volume of ambient noise set in advance with the volume of ambient noise detected by a microphone, and when the volume of ambient noise is greater than the fixed volume. Has a control for increasing the volume of the broadcast guidance of the passenger conveyor (see, for example, Patent Document 1).

  Another conventional system collects acoustic characteristics related to noise sources using a sensor microphone array, creates and stores antiphase signals for the collected acoustic characteristics, and the same noise source arrives. There is a silencer system that reproduces an antiphase signal each time it is performed (see, for example, Patent Document 2).

JP 2006-240802 A Japanese Patent No. 3370115

However, a conventional passenger conveyor broadcasting apparatus has the following problems.
・ The problem is that the volume cannot be adjusted in a chronically noisy environment.
-The problem of giving users discomfort and stress by broadcasting a loud sound in response to loud noise.
・ A problem that ambient noise and broadcast sound are mixed, and the broadcast content is not conscious.

  Further, the conventional silencing system in an open free space is for the same specific noise source and has a problem that it cannot cope with an unspecified noise source. In an environment where noise from a moving body (such as a train) is assumed, if there are multiple noise sources, noise generated from a moving body, and other noise, There is a problem that it is not possible to respond.

  The present invention has been made to solve the above-described problems, and a silencer system for a passenger conveyor and a silencer method for a passenger conveyor that can realize a more comfortable announcement even when there are a plurality of noise sources. The purpose is to obtain.

  The silencing system for a passenger conveyor according to the present invention is a silencing system for a passenger conveyor for suppressing the influence of specific noise that hinders listening to a message broadcast for passengers of the passenger conveyor, by driving the passenger conveyor. Characteristics of steady noise characteristics that occur regularly, intermittent noise characteristics that occur intermittently according to the installation environment of the passenger conveyor, and unsteady noise characteristics that generate non-steadyly according to the installation environment of the passenger conveyor Are stored in association with individual noise parameters, and each of steady noise characteristics, intermittent noise characteristics, and non-stationary noise characteristics is acquired via a microphone for each individual noise parameter and stored in the storage section in advance. And take out from the storage unit according to the noise parameters acquired during actual operation of the passenger conveyor The specific noise is calculated by combining each of the steady noise characteristic, intermittent noise characteristic, and non-steady noise characteristic, and an antiphase signal for muting the calculated specific noise is generated as a mute signal, and simultaneously with the message broadcast output. And a control unit that outputs a mute signal.

  The noise reduction method for a passenger conveyor according to the present invention is a noise reduction method for a passenger conveyor for suppressing the influence of specific noise that interferes with listening to a message broadcast for the passengers of the passenger conveyor, and drives the passenger conveyor. With regard to the steady noise characteristics that are generated constantly, intermittent noise characteristics that are intermittently generated according to the installation environment of the passenger conveyor, and unsteady noise characteristics that are generated non-stationarily according to the installation environment of the passenger conveyor, Characteristics obtained in association with individual noise parameters via a microphone and stored in the storage unit in advance, and steady noise characteristics extracted from the storage unit according to the noise parameters acquired during actual operation of the passenger conveyor Calculating specific noise by combining the intermittent noise characteristics and the non-stationary noise characteristics, and Those comprising the steps of: generating an anti-phase signal to mute the identified noise as mute signal, and outputting the same time mute signal and the output of the message broadcast.

  According to the silencing system for passenger conveyors and the silencing method for passenger conveyors according to the present invention, a plurality of noise characteristics are stored in advance according to the noise parameters, and according to the noise parameters measured during the actual operation of the passenger conveyor. Passenger conveyor that realizes a more comfortable announcement even when there are multiple noise sources by calculating a specific noise by combining multiple noise characteristics and outputting a mute signal that cancels the specific noise at the same time as the message broadcast A silencing system for passenger cars and a silencing method for passenger conveyors can be obtained.

It is a whole lineblock diagram showing the silence system for passenger conveyors in Embodiment 1 of the present invention. In Embodiment 1 of this invention, it is a block diagram which shows the internal structure of the control part for detecting stationary noise. It is the figure which put together the information management example of the steady noise in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a block diagram which shows the internal structure of the control part for detecting intermittent noise. It is the figure which put together the information management example of the intermittent noise in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a block diagram which shows the internal structure of the control part for detecting unsteady noise. It is the figure which put together the information management example of the non-stationary noise in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is a block diagram which shows the whole silencing system for passenger conveyors which performs silencing processing based on steady noise, intermittent noise, and unsteady noise.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a silencing system for a passenger conveyor and a silencing method for a passenger conveyor according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram showing a silencer system for a passenger conveyor in Embodiment 1 of the present invention. The silencing system for the passenger conveyor in the first embodiment includes a control unit 10, a broadcasting unit 20, a silencing unit 30, a microphone 40, a broadcasting speaker 50, and a silencing speaker 60.

  Next, the function of each component will be described. The control unit 10 is means for performing overall control of the broadcast unit 20 and the mute unit 30 described later. The broadcast unit 20 is a means for performing message broadcast such as guidance broadcast and caution broadcast to passengers on the passenger conveyor, and outputs a broadcast sound signal via the broadcast speaker 50.

  Further, the muffler 30 is configured to mute specific noise corresponding to unnecessary noise that does not need to be heard by passengers on the passenger conveyor, such as ambient noise detected in advance via the microphone 40. It is a means for generating a signal having an antiphase, and outputs an antiphase signal via the mute speaker 60.

  FIG. 2 is a block diagram showing an internal configuration of the control unit 10 for detecting steady noise in Embodiment 1 of the present invention. Specifically, the control unit 10 for detecting the noise (step sound, motor sound, inverter noise, etc.) of the passenger conveyor itself, which is steady noise (noise generated constantly) for the passenger conveyor user. The internal structure is shown. The control unit 10 according to the first embodiment detects steady noise by the calculation unit 11, the speed command output unit 12, the A / D converter 13, and the noise information storage unit 14.

  The operation speed of the passenger conveyor has regularity of several patterns. Therefore, the calculation unit 11 inputs a speed command value to be given to the motor 100 from the speed command output unit 12 as information on noise generated from the passenger conveyor itself, and also detects the sound detected via the microphone 40 as an A / D converter. 13 is input as digital data. Further, the calculation unit 11 stores the information relating to the noise generated from the passenger conveyor itself collected in this manner in the noise information storage unit 14 as steady noise according to the speed command value, so that it is necessary. Can be read.

  Such steady noise varies depending on the type of passenger conveyor, installation environment, and installation years. For this reason, it is possible that the calculating part 11 in the control part 10 updates the information regarding the noise which generate | occur | produces from a passenger conveyor itself in the following procedures. First, the calculation unit 11 periodically (or as necessary) determines whether the ambient noise collected via the microphone 40 when the passenger conveyor is stopped is a noise level close to that in the silent state. To do.

  Next, when the calculation unit 11 determines that the noise level is close to that in the silent state, the calculation unit 11 operates the passenger conveyor at a regular operation speed, and the noise at that time is regarded as the current steady noise, and the microphone is used. 40 is detected.

  FIG. 3 is a table summarizing information management examples of stationary noise according to Embodiment 1 of the present invention. When the noise in the surrounding environment is a noise level close to that in the silent state, the calculation unit 11 collects information as shown in FIG. 3 for each different speed command value from the speed command output unit 12 to obtain noise information. It can be stored in the storage unit 14.

  In FIG. 3, the case where the noise characteristics S1-S4 at the time of driving a passenger conveyor with respect to four types of speed command values is illustrated. Moreover, the noise characteristic at the time of a passenger conveyor stop also illustrates the case where it acquired as noise characteristic T1-T4 for every four types of speed command values with the date which acquired noise characteristics S1-S4 at the time of driving a passenger conveyor, respectively. ing. However, it is not always necessary to store the noise characteristics T1 to T4 when the passenger conveyor is stopped.

  The four types of speed command values in FIG. 3 are steady noise parameters for specifying steady noise. As will be described later, the calculation unit 11 can identify the steady noise characteristics S1 to S4 by reading the speed command value during the actual operation of the passenger conveyor as the steady noise parameter.

  Next, FIG. 4 is a block diagram showing an internal configuration of the control unit 10 for detecting intermittent noise in Embodiment 1 of the present invention. Specifically, noise in the installation environment (for example, train noise in the case of a station), which is intermittent noise (which is not generated constantly, but intermittently generated) for passenger conveyor users, is detected. The internal structure of the control part 10 for this is shown. The control unit 10 according to the first embodiment detects intermittent noise by the calculation unit 11, the A / D converter 13, the noise information storage unit 14, and the train arrival / departure passage information storage unit 15.

  The train arrival / departure passage information storage unit 15 in the control unit 10 stores train arrival / departure / passage information acquired from the train information input means 41 in advance. However, in reality, there is an error in the arrival and departure times of trains. For this reason, the calculation unit 11 calculates a train detection and a train speed based on a signal from the train detection sensor 42, and determines whether the train is a passing train or a departure train.

  Further, when the calculation unit 11 confirms the consistency between the train arrival / departure / passage information stored in the train arrival / departure passage information storage unit 15 and the determination result based on the signal from the train detection sensor 42, The sound detected at 40 is taken in as audio information converted into digital data by the A / D converter 13. And the calculating part 11 can read as needed by making the noise information memory | storage part 14 memorize | store the audio | voice information taken in this way as intermittent noise.

  This information is affected by the noise of the passenger conveyor itself (step sound, motor sound, inverter noise, etc.). For this reason, it is possible that the calculating part 11 in the control part 10 is memorize | stored in the noise information storage part 14 as intermittent noise data according to the state of a passenger conveyor.

  FIG. 5 is a table summarizing information management examples of intermittent noise according to Embodiment 1 of the present invention. As shown in FIG. 5, the calculation unit 11 performs intermittent operation as noise characteristics U1 and U2 at the time of passing a train and noise characteristics V1 and V2 at the time of arrival and departure of a train for each train type according to the train speed and the state of the passenger conveyor. Noise data can be stored in the noise information storage unit 14 in advance.

  In addition, the arrival / departure times of trains are periodically updated by updating the timetable or the like. In order to cope with such update of the timetable, the calculation unit 11 updates the train arrival / departure passage information in the train arrival / departure passage information storage unit 15 with the latest data acquired via the train information input means 41. Can do.

  The train speed in FIG. 5 and the state of the passenger conveyor are intermittent noise parameters for specifying intermittent noise. As will be described later, the calculation unit 11 identifies the intermittent noise characteristics U1, U2, V1, and V2 by reading the train speed during the actual operation of the passenger conveyor and the state of the passenger conveyor as the intermittent noise parameters. Can do.

  Next, FIG. 6 is a block diagram showing an internal configuration of the control unit 10 for detecting unsteady noise in Embodiment 1 of the present invention. Specifically, the inside of the control unit 10 for detecting the noise of the crowd and the rain noise which is non-stationary noise (noise that is not stationary noise or intermittent noise but non-stationary noise) for the passenger conveyor user. The configuration is shown. In the first embodiment, the control unit 10 detects unsteady noise by the calculation unit 11, the A / D converter 13, the noise information storage unit 14, and the time information generation unit 16.

  For example, in an environment where passenger conveyors are installed at stations, the noise of crowds differs greatly between morning and evening commuting hours and daytime hours. Therefore, the calculation unit 11 in the control unit 10 converts the sound detected via the microphone 40 at specific time intervals into digital data by the A / D converter 13 based on the time information from the time information generation unit 16. As audio information. And the calculating part 11 can read as needed by memorize | storing the audio | voice information taken in this way to the noise information storage part 14 as unsteady noise for every time slot | zone.

  The time information generation unit 16 has a calendar function, and the calculation unit 11 distinguishes between weekdays and specific days such as weekends and holidays and the year-end and New Year holidays with respect to the time information from the time information generation unit 16. Can do.

  Moreover, the calculating part 11 can acquire the boarding rate information of the passenger conveyor based on the electric current value of the motor 100 from the passenger conveyor boarding rate information input means 43, and associates information about unsteady noise with this boarding rate information. Can be distinguished.

  Furthermore, when there is an influence on the noise due to the weather of the installation environment, the calculation unit 11 can also obtain information on the weather from the weather information input unit 44 to distinguish information about the unsteady noise in association with the weather. it can.

  FIG. 7 is a table summarizing information management examples of non-stationary noise according to Embodiment 1 of the present invention. As shown in FIG. 7, the calculation unit 11 preliminarily converts unsteady noise data as noise information as noise characteristics W1 to W8 according to the noise acquisition time, day of the week, weather, passenger conveyor boarding rate, and passenger conveyor state. It can be stored in the storage unit 14.

  The noise acquisition time, day of the week, weather, passenger conveyor boarding rate, and passenger conveyor state in FIG. 7 are unsteady noise parameters for specifying unsteady noise. Then, as will be described later, the calculation unit 11 reads the time, day of the week, weather, the passenger conveyor boarding rate, and the state of the passenger conveyor during the actual operation of the passenger conveyor as the unsteady noise parameters, so that the unsteady noise characteristic W1. -W8 can be specified.

FIG. 8 is a block diagram showing the entire silencing system for a passenger conveyor that performs silencing processing based on steady noise, intermittent noise, and unsteady noise in Embodiment 1 of the present invention. In the first embodiment, as described above, each of steady noise, intermittent noise, and unsteady noise is defined as follows.
Steady noise: Noise that is generated regularly, equivalent to noise generated by the passenger conveyor itself (step sound, motor sound, inverter noise, etc.) Intermittent noise: Although not generated constantly, installation environment Non-stationary noise: Noise that is not stationary or intermittent noise, but is generated non-stationarily according to the installation environment. Equivalent to noise caused by disturbance factors such as crowds due to time etc.

  The steady noise information is stored in advance in the noise information storage unit 14 according to the procedure and contents described with reference to FIGS. 2 and 3 above, and the calculation unit 11 performs steady operation during the actual operation of the passenger conveyor. Based on the measurement result of the noise parameter, the steady noise characteristic can be specified.

  Further, the intermittent noise information is stored in advance in the noise information storage unit 14 in the procedure and contents described with reference to FIGS. 4 and 5, and the calculation unit 11 is intermittent during the actual operation of the passenger conveyor. The intermittent noise characteristic can be specified based on the measurement result of the noise parameter.

  Further, the unsteady noise information is stored in advance in the noise information storage unit 14 in the procedure and contents described with reference to FIGS. 6 and 7, and the calculation unit 11 performs the actual operation of the passenger conveyor. Based on the measurement result of the unsteady noise parameter, the unsteady noise characteristic can be specified.

  Therefore, the calculation unit 11 identifies and synthesizes a steady noise characteristic, an intermittent noise characteristic, and an unsteady noise characteristic corresponding to various noise parameters from various characteristics stored in advance in the noise information storage unit 14. . Thus, the calculating part 11 can calculate continuously the specific noise which is an unnecessary sound with respect to a passenger conveyor.

  Then, the muffling unit 30 creates a muffling signal having an opposite phase to the specific noise continuously calculated by the calculation unit 11 and outputs the muffling signal via the muffling speaker 60. In this way, by repeatedly generating and outputting a mute signal, unnecessary noise can be effectively mute according to various current noise parameters.

  The stationary noise characteristic, the intermittent noise characteristic, and the non-stationary noise characteristic are detected in a state where a necessary warning sound or the like generated from the guidance broadcast, the caution broadcast, or the passenger conveyor itself is not output. Therefore, the mute signal created based on this information is not used for guidance broadcasts or caution broadcasts output from the broadcast unit 20 via the broadcast speaker 50, or for necessary warning sounds generated from the passenger conveyor itself. Therefore, it is possible to mute only the various types of noise defined above without silencing.

  Moreover, the calculating part 11 can also calculate beforehand audio | voice data of the state in which the required warning sound etc. which generate | occur | produce from guidance broadcasting, attention broadcasting, and passenger conveyor itself are output as required audio | voice information data. In this case, the desired audio information data defined above is subtracted from each noise characteristic collected in the state where the necessary warning sound generated from the guidance broadcast, the caution broadcast and the passenger conveyor itself is output. Noise data can be obtained, and only defined noise can be silenced.

  In addition, when the calculation unit 11 outputs the mute signal via the mute speaker 60, the sound detected via the microphone 40 is converted into digital data by the A / D converter 13 and acquired. Can be detected. Therefore, the silencing system according to the first embodiment can increase the output volume from the broadcast speaker or perform early detection of other abnormalities based on the silencing effect of the audio data that is actually flowing. This will be specifically described.

  The computing unit 11 compares the acquired actual voice data with the voice data (message broadcast) related to the guidance broadcast, the caution broadcast, and the warning sound output via the broadcast speaker 50, thereby making the irregularities unpredictable. It is possible to determine whether or not there is a state in which such unsteady noise is large and a silencing effect cannot be obtained. As an example, when the degree of coincidence between the acquired actual audio data and the output message broadcast data is equal to or less than a predetermined value, the calculation unit 11 determines that a state in which a silencing effect cannot be obtained has occurred. be able to.

  When the calculation unit 11 determines that the predetermined silencing effect is not obtained, the calculation unit 11 may increase the volume of the guidance broadcast, the caution broadcast, and the warning sound output via the broadcast unit 20 and the broadcast speaker 50. it can.

  In addition, the calculation unit 11 determines that a predetermined silencing effect is not obtained, and the passenger conveyor boarding rate information acquired via the passenger conveyor boarding rate information input unit 43 exceeds a predetermined threshold. In this case, the volume of the guidance broadcast, the caution broadcast, and the warning sound from the broadcast unit 20 can be increased.

  On the other hand, when the calculation unit 11 determines that the predetermined silencing effect is not obtained and it is determined that the rain has started from the weather information acquired via the weather information input unit 44, the broadcasting unit 20 The volume of guidance broadcasts, warning broadcasts, and warning sounds can be increased.

  Note that the arithmetic unit 11 can also detect the silencing effect again after increasing the volume by a predetermined amount in the various cases described above.

  Further, regarding intermittent noise, for example, in the case of a station, the calculation unit 11 matches the train arrival / departure information in the train arrival / departure information storage unit 15 with the information acquired via the train detection sensor 42. If the consistency is not confirmed and the consistency cannot be confirmed, the mute signal may be noisy, so that the mute signal cannot be output.

  Furthermore, the silencing system in the first embodiment periodically detects, updates, and stores the noise of the passenger conveyor for each speed command value. For this reason, when the noise level of the data acquired at the time of the update process is significantly higher than the allowable level, the calculation unit 11 predicts an abnormality of the passenger conveyor device at an early stage, and makes an abnormality before the inspection. It is also possible to judge.

  As described above, according to the first embodiment, steady noise characteristics, intermittent noise characteristics, and unsteady noise characteristics can be stored in advance according to various noise parameters. And the specific noise which synthesize | combined various noise characteristics can be calculated | required according to the measurement result of the noise parameter in the actual driving | operation of a passenger conveyor. As a result, the muffler system for passenger conveyors and passengers that realizes a more comfortable announcement even when there are multiple noise sources by outputting a muffler signal having an opposite phase to the specific noise at the same time as the message broadcast A silencer method for a conveyor can be obtained.

  Furthermore, the silencing effect can be detected by analyzing the actual audio data when the silencing signal is output simultaneously with the message broadcast. Then, if the predetermined noise reduction effect cannot be obtained and it is difficult to hear the message broadcast, the sound level for the passenger conveyor and the noise reduction method for the passenger conveyor are obtained by increasing the volume of the message packaging to realize an easy-to-listen announcement. be able to.

  DESCRIPTION OF SYMBOLS 10 Control part, 11 Calculation part, 12 Speed command output part, 13 A / D converter, 14 Noise information storage part, 15 Train arrival / departure passage information storage part, 16 Time information generation part, 20 Broadcasting part, 30 Silencer part, 40 Microphone, 41 train information input means, 42 train detection sensor, 43 passenger conveyor boarding rate information input means, 44 weather information input means, 50 broadcast speaker, 60 mute speaker.

Claims (7)

A silencer system for a passenger conveyor for suppressing the influence of specific noise that interferes with listening to message broadcasts for passengers on the passenger conveyor,
Steady noise characteristics generated by driving the passenger conveyor, intermittent noise characteristics generated intermittently according to the installation environment of the passenger conveyor, and non-stationary generation according to the installation environment of the passenger conveyor A storage unit that stores each characteristic in association with an individual noise parameter;
Each of the stationary noise characteristic, the intermittent noise characteristic, and the non-stationary noise characteristic is acquired via a microphone for each individual noise parameter, stored in advance in the storage unit, and The specific noise is calculated by synthesizing each of the steady noise characteristic, intermittent noise characteristic, and non-stationary noise characteristic extracted from the storage unit according to the noise parameter acquired during operation, and the calculated specific noise is muted. A noise reduction system for a passenger conveyor, comprising: a control unit that generates an anti-phase signal as a mute signal and outputs the mute signal simultaneously with the output of the message broadcast. In the silencing system for passenger conveyors according to claim 1,
The control unit obtains audio data, which is a result of outputting the mute signal simultaneously with the output of the message broadcast, via the microphone, and the degree of coincidence between the audio data and the message broadcast is a predetermined value or less And determining that the influence of the specific noise has not been suppressed, and increasing the volume of the message broadcast by a predetermined amount. In the silencing system for passenger conveyors according to claim 1 or 2,
The control unit uses the speed command value for driving the passenger conveyor as a noise parameter for steady noise characteristics, and the voice data acquired via the microphone for each noise parameter as the steady noise characteristics in the storage unit. A noise reduction system for a passenger conveyor, which is stored in advance and takes out a steady noise characteristic corresponding to the speed command value during actual operation of the passenger conveyor from the storage unit. In the silencing system for passenger conveyors according to any one of claims 1 to 3,
When the passenger conveyor is installed in a station and noise is generated intermittently due to passage and departure and arrival of trains, the control unit sets the speed of the train as a noise parameter for intermittent noise characteristics for each noise parameter. Voice data acquired via a microphone is stored in advance in the storage unit as the intermittent noise characteristics, and intermittent noise characteristics corresponding to the speed of the train during actual operation of the passenger conveyor are extracted from the storage unit. Silencer system for passenger conveyors. In the silencing system for passenger conveyors according to any one of claims 1 to 4,
In the case where noise is generated unsteadily depending on the date and time in the environment where the passenger conveyor is installed, the weather, and the boarding rate of the passenger conveyor, the control unit, the date and time, the weather, and the boarding rate of the passenger conveyor As a noise parameter for unsteady noise characteristics, voice data acquired via the microphone for each noise parameter is stored in advance in the storage unit as the unsteady noise characteristics, and the date and time during actual operation of the passenger conveyor A silencing system for a passenger conveyor, wherein unsteady noise characteristics according to the weather and the passenger conveyor boarding rate are extracted from the storage unit. A silencer method for a passenger conveyor for suppressing the influence of specific noise that interferes with listening to message broadcasts for passengers on the passenger conveyor,
Steady noise characteristics generated by driving the passenger conveyor, intermittent noise characteristics generated intermittently according to the installation environment of the passenger conveyor, and non-stationary generation according to the installation environment of the passenger conveyor With regard to the unsteady noise characteristics to be obtained, each characteristic is obtained through a microphone in association with individual noise parameters, and stored in a storage unit in advance.
Calculating the specific noise by synthesizing each of stationary noise characteristics, intermittent noise characteristics, non-stationary noise characteristics extracted from the storage unit according to noise parameters acquired during actual operation of the passenger conveyor;
Generating a reverse phase signal for silencing the calculated specific noise as a silencing signal;
And a step of outputting the mute signal simultaneously with the output of the message broadcast. The silencing method for a passenger conveyor according to claim 6,
Audio data that is a result of outputting the mute signal simultaneously with the output of the message broadcast is acquired via the microphone, and when the degree of coincidence between the audio data and the message broadcast is a predetermined value or less, the specific data A silencing method for a passenger conveyor, further comprising the step of determining that the influence of noise has not been suppressed and increasing the volume of the message broadcast by a predetermined amount.

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