please define "high frequency"
930592
It means N a radio-frequency band or radio frequency lying between 3 and 30 megahertz
2233543
The "HIGH" setting on the microwave. This comes with a small instruction booklet.
644546
I have seen the come on new high end units. It works well to cut down the noise.
435017
yes, suitable for home hi-fi. amazing accurate sound reproduction across the frequency spectrum. the sound reproduction is 'flat' in that no component of the range is accentuated. this may disappoint some who have become accustomed to 'boomy' bass frequencies. my fav 'cans' for serious listening. I favor this type of on-ear phones as opposed to over ear units like the Momentum
786635
The frequencies can be set in frequency steps of 2.5, 5, 6.25, 10, 12.5, 20, and 25 kHz in the range from 136-174 MHz and 400-520 MHz.
2284151
This device is an upconverter, which will take radio signals in AM broadcast through upper HF bands, and output them shifted up by 125MHz. This is a useful thing for those using RTL based software defined receivers, since they don't cover the medium wave and shortwave HF bands.
1197216
This headset was designed for use as a communications headset. In high fidelity audio, an amplifier requires a frequency response of around 20 to 20 kHz with a tolerance of at least ±0.1 dB in the mid-range frequencies of around 1000 Hz, however, in telephony, a frequency response of 400 to 4 kHz with a tolerance of ±1 dB is sufficient for speech. If you already own one, don't have high expectations for its intended use. If, on the other hand you are shopping for something, look for headsets designed for music that typically has a much higher frequency range, and whose manufacturers publish specifications for its product. This headset was designed for use as a communications headset. In high fidelity audio, an amplifier requires a frequency response of around 20 to 20 kHz with a tolerance of at least ±0.1 dB in the mid-range frequencies of around 1000 Hz, however, in telephony, a frequency response of 400 to 4 kHz with a tolerance of ±1 dB is sufficient for speech. If you already own one, don't have high expectations for its intended use. If, on the other hand you are shopping for something, look for headsets designed for music that typically has a much higher frequency range, and whose... » Read More This headset was designed for use as a communications headset. In high fidelity audio, an amplifier requires a frequency response of around 20 to 20 kHz with a tolerance of at least ±0.1 dB in the mid-range frequencies of around 1000 Hz, however, in telephony, a frequency response of 400 to 4 kHz with a tolerance of ±1 dB is sufficient for speech. If you already own one, don't have high expectations for its intended use. If, on the other hand you are shopping for something, look for headsets designed for music that typically has a much higher frequency range, and whose manufacturers publish specifications for its product. « Show Less
914849
And indeed a lot of headphones roll off sharply at around 20khz for this reason - why bother to reproduce sound at this range accurately or at all? Some will argue that the sounds at &gt;20khz have subharmonics that do reach below 20khz, and so you need the higher frequencies. Others claim to be able to hear beyond 20khz or to be very sensitive to the higher frequencies. You can also argue that it surely doesn't hurt to reproduce beyond the normal human hearing range, and that it might be a sign of the engineering excellence of the system as a whole. Me, I don't take sides, but tend towards the latter point of view: Probably not needed, but won't hurt.
144571
The long answer starts here... http://en.wikipedia.org/wiki/Radio_frequency
1362649
Yes. There is a custom EQ. Ranges are 80, 250, 1k, 4k, 13k HZ. With DB +12 to -12.
1679436
wow, I am not 100% sure if they use the same frequency, as I only have the one. sorry
539980
It's pretty high pitched. I have trouble hearing it. It would be a great alarm if "alert" was lower frequency and a bit louder.
550107
Depends on the frequency. For example when you hear a party going on in the distance or down a few apartments, it is usually the bass that you hear since the lower frequency, longer wavelength penetrates the walls more readily than the higher frequency, shorter wavelength highs. http://en.wikipedia.org/wiki/Noise_reduction_coefficient
350698
Hello, no problem, this device has two button for change frequency from 87.5 to 108.0 MHz.only you have to find a "no used" frequency.its so easy!
1045467
Mhz streams for megahertz, it relates to the channel your transmitter and reverberate are on. And how clean a signal you have.
274137
No. That is an entirely separate frequency. Check out cell boosters from Wilson electronics. They make what you would need.
595868
It has a high volume setting which is good for my husband since he has tinnitus from military service.