Q: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Switzerland’s cow bell-toting custom is coming under scrutiny in the light of new research from the federal technology institute ETH Zurich. (SRF/swissinfo.ch) 
  
 Scientists have proven that cowbells have an impact on cows’ wellbeing. As part of a PhD study involving more than 100 cows on 25 farms across the country, animals were fitted with 5.5 kilogram bells plus monitors to gauge the sound level, the cows’ movements, heart rate and eating habits. Tests were carried out over three days. 
  
 Bell sounds were played at different volumes to cows feeding in barns. Some animals were fitted with bells that didn’t ring, to see how they reacted to the weight. Both had a negative effect on their eating behaviour. They ate for shorter periods and chewed less. It’s not clear whether the weight of the bells or the sound of them had more influence. The effect on milk production was not measured. 
  
 The loudness of the bells was 100-113 decibels. The Swiss Accident Insurance Fund says if a human were exposed to 100 decibels for eight hours per day, it would have serious health consequences, and cows are more sensitive to sound than humans. ||||| The classic cow bells worn by Swiss bovines could be damaging the animals’ hearing and feeding habits, according to researchers in Zurich. 
  
 A recent study at the Swiss Federal Institute of Technology studied more than 100 cows carrying 12-pound bells at two dozen farms across the country, and found that the bells can lead to deafness in cows, whose hearing is more sensitive than that of human beings. 
  
 The bells can create noise levels of up to 113 decibels, about the amount of noise made by a chain saw and louder than the legal noise limit of 85 decibels. The researchers also said cows wearing bells tended to chew for less time than cows without bells, reports Schweiz Am Sonntag. 
  
 Farmers said that Switzerland’s 12-pound cowbells are an iconic part of the country’s cultural heritage, and that replacing cowbells with GPS devices would hurt Switzerland’s image. The heavy cowbells are rarely used except at ceremonial occasions. 
  
 The study didn’t conclude whether the weight of the bells or the sound of their ringing were causing cows to change their behavior. 
  
 [Schweiz am Sonntag] |||||
A:
Cowbell-clad cows are an iconic part of Swiss culture, but that doesn't mean the cows are happy about it. A new study out of the federal technology institute ETH Zurich studied 100-plus cows over a three-day period at 25 farms. Those who wore cowbells—some of which rang, some of which didn't—ate for shorter amounts of time and even chewed less, reports Swiss Radio International. Researchers say it's unclear which was the chief culprit: the weight of the bells (12 pounds) or the sound (up to 113 decibels). The decibel level of the bells is the equivalent of a chainsaw; the Swiss Accident Insurance Fund says human exposure to this level of noise for even eight hours a day would negatively and seriously affect health. And since the bovine ear is even more sensitive than the human one, the bells might lead to deafness in cows, reports Time. But the head of the Swiss Countryside Union counters that the cows only wear "size 31" bells during ceremonial occasions—as little as once a year, reports the Local. He brushes off the idea of replacing the bells, which farmers use to locate their cattle, with GPS devices; farmers point out that reception in the alpine areas would be poor. The study didn't investigate whether the bells had any effect on milk production. (Meanwhile, check out why it's not uncommon in Switzerland to see cows hanging from helicopters.)