Do you want to be "fried" in your ears?Some people in Hangzhou showed the scene of the subway, and netizens shouted "feel the same"!Metro Group response

"The ears are‘ exploded ’.”

Recently, Ms. Gao reported to Qianjiang Evening News · hourly journalist to report that some sections of Hangzhou Metro Line 3 were running out of noise. It hurts. At first, I thought that only I was like this. I asked a few sitting on Line 3, and they all felt the same, and they said it was very uncomfortable. "

Ms. Gao's discussion on noise in the group.

Ms. Gao lives near Dingqiao Station. From late June this year, take the daily commuting of Metro Line 3. "At that time, I felt that the subway was noisy, but I didn't pay much attention. Later, I found that many people were like me and felt uncomfortable. A friend told me that she had a long time after she left the subway and her ears hurt. "

Is the carriage in Metro Line 3 really as Ms. Gao said with noise? Is the noise big?

The screams in the carriage are uncomfortable, and some passengers wear take -off and land noise headphones

At 9 am on the morning of August 10, the reporter took the subway line 3 to experience the on-site experience of the "Steam Plaza Station-Dingqiao Station" subway section reflected by Ms. Gao, and used the mobile phone decibel app to make a simple measurement.

The results showed that when the train started, the carriage was relatively quiet, and the score was about 65 at this time. When running halfway, a sharp screaming sounded in the carriage. The decibel value floated up and down at 80, up to 84, and the reporter's ears also produced a little pain.

The reporter took the subway through Xintiandi Street Station, Steaming Plaza Station, Huafeng Road Station, Taohua Lake Park Station, and finally arrived at Dingqiao Station, and then returned in the same line.

Each site can almost hear this noise in the operating range. Between the two sites, the average run is about 5 minutes, and the scream lasted for 2-3 minutes.

The passengers in the compartment also spit out to the reporter, "Ears are uncomfortable!" "Finally someone feels the same as me!" "Yeah, the sound is loud, and speaking with the people next to it is hard."

The reporter observed that after the sound of Xiao, some passengers began to look up and watched around, with a slightly strange expression, and some people put on noise -lower headphones. However, some passengers said "okay", saying that other subway lines in the city have heard similar noise, "now are used to it."

Where is the noise of the carriage of Line 3? Not within the relevant standards

Because of the noise, at the end of July, Ms. Gao called Hangzhou Metro customer service. "At that time, the subway customer service told me that it had noticed the relevant situation and would reflect it up."

The next day, the subway called Ms. Gao, explaining the cause of the noise, saying that there were more curves on Metro Line 3, and the subway carriage was relatively closed, but it was not completely closed, so it was easy to scream noise. At the same time, the subway stated that the trains have been reduced to a speed reduction in the early construction phase, and the noise score value has also been within the standard scope of the state.

Ms. Gao said that she could understand the cause of noise, but she questioned the "noise within the scope of the national standard".

She showed reporters the screenshot of the measurement results of the mobile phone decibel app APP on August 1st. I think the error is not too big, because I have clearly felt uncomfortable. "

Screenshot of Ms. Gao's mobile phone scattered instrument on August 1

The reporter inquired about the current relevant national standards, that is, the "Urban Rail Transit Train Noise and Measurement Method" (GB 14892-2006), which has been implemented since August 1, 2006. The standard document shows that the noise limit for the indoor indoor indoor indoor of the subway in my country is 75 decibels, and the noise limit in the underground guest room is relatively high, 83 decibels.

Screenshot of the reporter on August 10

How to relieve the noise of the subway? You can try these methods

On the evening of August 10th, the hourly reporter called the subway customer service. The reply from the subway was similar to Ms. Gao Gao. They all said that there were similar situations that have been reported before, and the number of staff in the future was measured. National standard.

In addition, the subway customer service also revealed to reporters that Metro Line 3 has happened to speed up on August 10, and will then give feedback from the company's relevant departments to the passengers' opinions on "big carriage noise" and decide whether to make corresponding measures to ensure that passengers travel Feelings, we also welcome citizen friends to continue to pay attention.

Is the subway noise annoying, does it hurt human health? How to relieve the ear discomfort brought by it?

Chen Zhiling, chief physician of the Department of ENT Department of Hangzhou Hospital of Traditional Chinese Medicine, said that the pain in the ears when riding a transportation is mainly due to changes in the surrounding air pressure environment, which leads to imbalance in the air pressure of the human eustachian tube. Trains such as high -speed rail passed through tunnels and culverts. Normally, noise is less than 60 decibels, and the human body will not have much reaction, and more than 60 decibels will cause discomfort. As for the harm to the human body in the end, it is mainly determined by noise intensity and contact time. If it is about 10-20 minutes of subway noise per day, there is generally no problem.

At the same time, Chen Zhiling pointed out that the size of noise hazards depends on everyone's sensitivity to sound. Everyone has their own allergies, just like patients with allergic rhinitis are allergic to dust. Some people are sensitive to their sounds than ordinary people. Such people feel "unbearable" for low -intensity noise within the acceptable range of ordinary people. He suggested that when this part of travel citizens take the subway, they can choose to use noise -proof earplugs to block noise. In addition, through chewing gum, yawning, ear health care, etc. Seek medical treatment in time. "

Metro Group response

At more than at 7:30 on August 10th, on the noise of Hangzhou Metro Line 3, Hangzhou Metro Group officially responded to hours of journalists.

Hangzhou Metro Group says that the production of noise is related to the curve (small radius curve), speed, tunnel diameter, wheel track contact surface, vehicle closedness, traction braking noise, etc. , Police with the speed.

The Hangzhou Metro Line 3 was opened on February 21, 2022. After the opening of it, the operating company does daily inspections and maintenance of line operations, and organizes the establishment of online noise testing on the entire line. The orbital equipment is in normal state.

Before the opening of Line 3, through the safety assessment and environmental impact assessment before operation, the full -room noise LEQ value meets national standards.

At present, there are two main measures for noise reduction in Hangzhou Metro: 1. In sensitive areas, the steel spring floating plate bed, rubber pad reduction, vibration reduction deduction, etc. in sensitive areas to reduce the sound source of the vibration noise of the wheel track, Essence 2. Use a rail to polish the car for pre -polishing operations.

In response to the feedback of passengers' noise on Line 3, Hangzhou Metro will reduce the noise of the rail through the method of polishing, increasing the noise cancer device, and increasing the rail coating device. At the same time, noise is reduced by improving door closure and improving equipment noise.

In order to improve the comfort of passengers' ride, Hangzhou Metro will do daily inspections and maintenance for operating line operations, and follow -up will further strengthen rail maintenance and inspections.

Source: Qianjiang Evening News · hour news apprentice reporter Ma Qinglong reporter Sun Yan correspondent Xu Youjia duty editor: Zhou Qin

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