Branson 2000 Welder Noise

30% power, or duty cycle?

What does Branson have to say?

Say What?

"Most ultrasonic welders have a fundamental operating frequency of 20 kHz. However, a good deal of noise may be present at 10 kHz, the first sub-harmonic frequency of the 20 kHz operating frequency, and is therefore audible to most persons. Ultrasonic welding uses intermittent energy. Only the noise generated during the few seconds of each cycle when the equipment is energized causes exposure to noise. The individual energy cycles are accumulated to equal the duration of exposure. Most of the audible noise associated with ultrasonic sources, such as ultrasonic welders or ultrasonic cleaners, consists of sub-harmonics of the machine's major ultrasonic frequencies.

In extreme cases, this can be disturbing, causing hearing discomfort, occasionally nausea, and sometimes a temporary shift in the threshold of hearing (sound pressure level, or loudness, that can be heard).Many countries control the amount of audible noise that a worker can receive. In the United States 90 dBA noise level can be maintained continuously for 8 hours. Higher noise levels are permissible for shorter periods of time, typically:
http://usblog.dukane.com/2010/06/ultrasonic-welding-effects-on-hearing.html

Excellent info. Mr. SolarEagle

I´m going to check in to that Noise Shield and see how would that affect the production line, for now, it looks like the best option is to use some hearing protection.

Have you experienced any overload alarm...?

"... A failing horn or booster often creates a loud, high-pitched noise immediately before an overload alarm occurs. "

http://jascoes.com/2011/07/12/overload-alarm/

One of the accessories available for the machine is a sound enclosure.

Without digging into it a whole bunch, that indicated to me the problem is universal.

Great help guys,

Thank you very much