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How effective are the anti-barking devices that utilize ultrahigh frequency sound?
Wiki User
∙ 12y ago
Everyone has their own opinions about anti barking devices. Many people view these as cruel and perhaps inhumane, especially the shocking ones of course. These run a huge risk of making the dog fearful of doing anything, as a dog will not make the connection between barking (which is a very natural thing for a dog to do) and (possibly painful) noises going off. It's really all about personal preference.
Wiki User
∙ 12y ago
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Is there a device to detect low frequency infra sound waves?
The most common such devices are the seismographs and Hydraphones.
How far tsunami warning devices are effective in alarming people?
sometimes it happens that people doesn't know about the situation that they may face during tsunami.so, in order to avoid this,tsunami warning devices are effective to alarm people about the arriving tsunami so that that they could be mentally prepared to face the tsunami.
Is 315 MHz an open frequency and can anyone broadcast on it?
We usually see low power (short range) devices used on 315 MHz. An example of an RF (radio frequency) gadget that operates here is a garage door opener. But while 315 MHz is an open frequency and can be use fairly freely, be cautious in your experiments on the band. Interference is a growing issue and mutual respect is a must for any real investigator who plies the waves in this band.
How we can check the frequency in Hertz in our home electric current?
A frequency counter is the most accurate way. As stated above some digital multimeters include this feature, but stand alone frequency counters are also available. Another way is to use an oscilloscope and measure the period of one cycle, then calculate the frequency as the reciprocal of the period you measured. Another way is to use a multiple tuning fork frequency meter. These devices have perhaps a dozen tuning forks tuned to different frequencies (with the 60 Hz fork in the center, lower frequency forks to the left, and higher frequency forks to the right) and an electromagnetic excitation coil. The tuning fork(s) closest in frequency to the powerline will vibrate and the others will remain stationary, allowing you to read the frequency. They are a bit course in their measurement, but usually can identify differences of about 0.1 Hz. However, if your home is powered from the national power grid (not a local generator) the frequency is required to be 60 Hz to a precision that a clock synchronized to the power line will never be more then 10 seconds fast or slow of the correct time, although the line frequency might be high or low for short periods as much as a couple Hz.
Is it true that the radiation of photocopier machine is harmful?
No. A photocopier emits light radiation at levels commonly encountered in the industrialized world. That is not harmful. Like all electronic devices, a photocopier emits low frequency, very low frequency, and extremely low frequency electromagnetic radiation, but in amounts similar to other widely used machines. If this level of emission were hazardous, there would be highly visible warning symbols displayed on the machines, and a highly visible epidemic of the hazardous effects. No such symbols are posted on the machines, and no such epidemic has been seen.
How effective are the anti barking devices that utilize ultrahigh frequency sound?
Everyone has their own opinions about anti barking devices. Many people view these as cruel and perhaps inhumane, especially the shocking ones of course. These run a huge risk of making the dog fearful of doing anything, as a dog will not make the connection between barking (which is a very natural thing for a dog to do) and (possibly painful) noises going off. It's really all about personal preference.
What is the voltage and frequency used in US and why?
the voltage and frequency are 110v and 50(or)60hz because the devices which are invented in us are work at that voltage and it is efficient for that devices.
What are frequency Polygon?
Frequency polygons are graphical devices used for understanding the shapes of distribution.
What is the Difference between frequency converter and frequency inverter?
frequency is genrally cycle per second, and frequencies may be of a dc nature or ac , devices which convert dc frequency in to an ac frequency are frequency converters and devieces which convert ac frequency in to dc frequency are frequency inverters. because in terms of power electronics, devices which convert ac to dc are called converters, and devices which convert dc in to ac are called "inverters" 'mehboob hunzai" I'm a engineers in this devices, the frequency inverter is convert AC to AC but with variable frequency output, means the frequency & voltage are adjustable; The frequency converter can convert DC to AC, like 24VDC to 220VAC and also the frequency is adjustable. One most important thing is the out power of frequency inverter just can be used for controlling AC motor, while frequency converter can be treated as normal power supply as our daily using power grid. "zhuge fs"
What was the first ever mobile phone invented?
Wasnt a phone as such, first wireless communication was through Morse code using long range frequency devices. Very primative now but still effective if you know how.
Electro- Explosive devices can be inadavertently initiadted by which of the following?
Radio frequency(rf) energy
When do electronic devices step over the line from effective management controls to intrusions on employee rights?
When do electronic devices step over the line from effective management controls to intrusions on employee rights
What does 'FM compatible' mean with hearing aid devices and What is the use of this function?
FM compatible hearing aid devices means that that the Frequency Modulation is okay.
Does the pestacator really work?
Electronic devices are not effective long term.
What are high frequency spark generators?
High frequency spark generators are essential mechanical devices that are used in cars to start the ignition. This device is usually powered by batteries.
Does a bluetooth uses infrared technology to transfer data between devices?
No, it uses radio frequency signalling.
Does the Air Force really use microwaves or electromagnetic frequency devices to cause people to have heart attacks?
No.
