True or False

True or False

1) A stainless steel transducer is better then a polyurethane transducer.

FALSE
To achieve an optimal ultrasound irradiation from the transducer into any liquid, there needs to be a certain impedance matching between the material (housing) of the transducer and the liquid. The bigger the difference between the impedance value, the higher the reflection coefficient, the less ultrasound will be transmitted into the liquid. For example, the impedance of a polyurethane housing is closer to the impedance value of water. This will results in low reflection coefficient values and good ultrasound transmission. At the other hand, stainless steel housing will result in high reflection coefficient and low transmission values. In this case, much of the energy produced by the transducer will be reflected back into the transducer ceramic element.

2) Some of your competitors claim to be professor, don’t you have professors working for LG Sound?

FALSE
In many European countries (such as: Belgium, France, the Netherlands) professor is not a legally protected title. This means everybody can call him- or herself a professor. A protected title, referring to an education which has been completed is for example Engineer, Master or Doctor (Phd.).
Thus, the title professor does not say anything about the expertise of a person. LG Sound does have certified biologists, Engineers, Masters and Doctors employees. If necessary, LG Sound’s employees could send their diploma(s).
We doubt if “the professor” can send any university diploma when asked for.

3) The electronic box of the LG Sonic® can be left outside in all weather conditions?

TRUE
LG Sound has aluminium electronic boxes with an IP degree of 67. This means that the boxes can be left outside during dry and wet weather.

4) The LG Sonic® units send high voltage directly into the water

FALSE
The LG Sonic® units can perform on solar energy (low DC voltage) and on alternating current (AC) of 110 or 220 Volt. Initially, both DC or AC electrical energy will be received by the electronic box installed on dry land.

- Secondly, the electronic box will convert the relatively high voltage (in this case AC voltage) containing high amperes value into low power signals of low amperes value (milliamps). Thirdly, the transducer translate these incoming specific signals into ultrasound of specific frequencies. Even when a transducer cable is damaged this can not become of any danger to humans or the other life forms present in the water.

5) LG Sound does not provide units capable to operate on solar power?

FALSE
Next to being capable of operating on alternating current (AC) input, the LG Sonic® models are all capable of performing on solar power or any other DC power input. The LG Sonic® models operate on power input of 24 V. The overall power consumption is low (max 13 Watt/hour), which makes it possible to use small solar panel.

6) The strength of the sound signal is lost when being transmitted outside the transducer

FALSE
LG Sound guarantees the ultrasound transmitted ranges as stated. The power of the ultrasound signal being send from the electronic box to the transducer is not lost, this is because of the special manufacture transducer cable connecting the transducer to the electronic box. The LG Sonic® transducer translate the electrical signal in a very efficient way (minimum signal lost). Furthermore, the housing of the transducer insures also an efficient transmission of ultrasound into water. All these aspects insures the different ranges which ultrasound is being transmitted.

7) The sound waves produced by the LG Sonic® can not interfere with behaviour (or the physiology) of (terrestrial or marine) animals sensitive to certain ultrasound frequencies?

TRUE
The sound waves do not interfere with any life outside or inside the water.

8) The sound waves produced by the LG Sonic® can interfere with radio signals

FALSE
In all case studies done with the LG Sonic® system, it was never found that the LG Sonic® interferes with radio signals. After all, radio type signals are completely other signals than ultrasound.

9) The LG Sonic® units have the lowest power consumption in comparison with all the other brands of algae control ultrasound devices available on market?

TRUE
The power consumption of the LG Sonic® systems is the lowest on the market today.

10) Units with a higher power consumption show to be more effective in suppressing/controlling algal growth.

FALSE
The efficiency of a unit is normally not influenced by the power consumption but by the specificity and the accuracy of the ultrasound signals transmitted into the water.
For example, units with a high power consumption can loose allot of sound power (dB’s = decibels), because the transducer would not be able to efficiently translate the incoming signals if this is of to much power. Please, read also: “1.) A stainless steel transducer is better then a polyurethane transducer.” stated above.
Furthermore, the algae growth control/suppressing efficiency of an ultrasonic device depends also on the quality of sound waves which is being send out. This is reached by the effective signal calculation and production by the LG Sonic® electronics and the effective translation of these signals by the LG Sonic® transducer into ultrasound, and the effective transmission of ultrasound into the water.
These are the 3 effectiveness mechanisms of the LG Sonic® systems.
Scientific research has shown that, even though the LG Sonic® has the lowest power consumption, the LG Sonic® does have the strongest sound signal on the market today.

11) The LG Sonic® transducer can become overheated when placed outside the water.

FALSE
The LG Sonic® transducer can not overheat. It is true however, that when the transducer is placed outside of the water for longer periods, the life-span of the transducer can be shortened. Therefore, we advice to turn off the LG Sonic® system when being removed from the water.

12) The LG Sonic® does not have any effects on other life forms such as fish, water plants, water insects, zooplankton etc.

TRUE
According to our scientific researches and per our numerous experiences, there were no evidence found which indicates that the ultrasound produced by the LG Sonic® systems have any negative effect on these organisms.