FIRE CREWS FROM NAPA AND SONOMA
COUNTY ARE BATTLING IT.
STRONG WINDS CANNOT BE
HELPING.
THAT IS UNLESS THEY ARE HOPING
THE GOLDEN GATE BRIDGE TO BE A
BIG WHINER.
AND I LOOK AT THE GOLDEN GATE
BRIDGE.
OUR CAMERA ATOP THE SALESFORCE
TOWER.
IT HAS ALWAYS BEEN A VISUAL
SYMBOL OF THE CITY BUT NOW IT
HAS A NEW SOUND.
WILSON WALKER ON THE UPGRADE
CAUSING THE SPAN TO SING.
AND AN INCREDIBLE DAY AT THE
BRIDGE JUST FOR THE PROTEST
ALONE BUT YESTERDAY ALSO A
REMARKABLE DAY FOR THE GOLDEN
GATE BRIDGE.
IT STARTED SINGING AT LEAST AT
A VOLUME THAT COULD BE HEARD
CLEAR ACROSS THE CITY.
COULDN'T REALLY DESCRIBE THE
SOUND.
I THINK I DESCRIBED IT AS
WINDCHIMES AND THEN WHEN YOU GO
BLOW INTO A BEER BOTTLE IT
SOUND LIKE MULTIPLE BEER
BOTTLES.
A HOME, A GHOSTLY WILL.
THE NOISE IS NOT SO HARD TO
DESCRIBE BUT IT IS SOMETHING
THEY HAVE BEEN A HARD TIME TO
IDENTIFY.
THEY HAVE BEEN CHASING THE
SOURCE SINCE APRIL.
WHAT IS THE SOUND?
I AM ALONE BECAUSE I AM GOING
THROUGH THERE.
AM I THE ONLY WHEN HEARING
THAT?
I THINK IT WAS LAST WEEK AND
I WAS A LITTLE BIT FREAKED OUT.
ON THE BRIDGE ITSELF THIS IS
SOMETHING CYCLISTS HAVE NOTICED
IN RECENT WEEKS.
IT IS KIND OF LIKE A
WHALING.
A SINGING OF METAL.
THIS IS A PART OF THE WIND
RETROFIT PROJECT WHERE WE HAVE
REPLACED THE HANDRAIL SO THE
BRIDGE CAN BE RESILIENT TO HIGH
WHEN.
AIR CAN FLOW MORE FREELY ACROSS
THE BRIDGE MAKING IT MORE
RESILIENT TO WIN.
IT ALSO PRODUCES THE HOME WE
ARE HEARING AND THE GOLDEN GATE
BRIDGE DISTRICT SAYS THAT WAS
EXPECTED.
THEY CALL THIS A FEATURE OF THE
NEW HANDRAILS.
YESTERDAY'S A VERY STRONG WINDS
DIODE OF THE VOLUME AND THE
DISTANCE THE SOUND COULD CARRY.
PEOPLE HEARD IT ALL OVER SAN
FRANCISCO AND SOME EVEN SAID
THEY CAN HEAR IT ACROSS THE BAY
IN BERKELEY.
WE HEARD IT AS WELL IN LOWER
WIND ENVIRONMENTS.
IT WAS A LOW-LEVEL HOME.
COULDN'T BE REALLY HEARD
OUTSIDE OF THE BRIDGE.
YESTERDAY IS WHEN WE EXPERIENCE
THE EXCEPTIONALLY HIGHER WIND
WHERE WE KNEW THERE WOULD BE AN
AUDIBLY HIGHER WIND.
WE LIVE IN OUTER RICHMOND
AND WE COULD HEAR IT FROM OUR
HOUSE.
THE REAL REPLACEMENT IS
ABOUT 75% COMPLETE SO THE NOISE
COULD THEORETICALLY STILL GET A
BIT LOUDER GIVEN THE RIGHT TO
WIND CONDITIONS.
THE DISTRICT HAS NO PLANS TO
CHANGE COURSE ON THE PROJECTS
THE SONG.
THE HEARD THE BRIDGE SEEING AND
IT IS SOMETHING YOU WILL HEAR
AGAIN.
IT IS NEW.
IT WILL TAKE TIME TO ADJUST TO
IT.
IT IS SOMETHING WE ANTICIPATED.
IT IS AN INTERESTING NEW
ELEMENT TO AN 80-YEAR-OLD
BRIDGE.
YOU CANNOT INTRODUCE NEW
SOMETHING NEW TO A STRUCTURE SO
OLD.
LET THE RESEARCH BEGIN INTO
WHAT THE CORRECT THRESHOLD OF
VELOCITY IS TO ACHIEVE THAT
SUSTAINED.
WE DON'T KNOW EXACTLY WHAT THE
MILE-PER-HOUR IS ON THAT BUT
SOMEONE IS GOING TO FIGURE IT
OUT.
WE ARE GOING TO BE LIVING WITH
THIS FOR A LONG TIME.
LET'S TRY AND START TO GET
TO THE BOTTOM OF THIS AT LEAST
A LITTLE BIT.
IT IS A NEW THING FOR ALL OF
US.
WHAT WAS SPECIAL ABOUT
YESTERDAY?
WHY WAS IT SO MUCH LOUDER THAN
TODAY?
THE GUSTS YESTERDAY HIT 43
MILES PER HOUR.
THAT IS THE MAGIC FREQUENCY?
ALL I AM SAYING IS THAT WAS
CLEARLY DIFFERENT.
TODAY'S GUSTS ARE NOT THAT
STRONG.
PEOPLE ARE STILL HEARING IT
TODAY.
IT IS NOT LIKE YESTERDAY.
DIFFERENT VARIATIONS.
