Impressed by the elegant design of LG’s first generation LG Tone Bluetooth headphones? Then you’ll love the LG Tone Ultra, featuring ANC noise cancellation technology and a neckband comprised of a special alloy that retains its original shape after use. Even sleeker and leaner than before, the LG Tone Ultra headphones continue to award the listener with superior stereo quality sound you’d expect from LG. Currently available in white or black.
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LG announces new Tone Ultra headphones.
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I’m seeking info for sanctuary reverberation absorbsion material ( panels) and best placement.
There may be apps that do that. You can definitely find spectrum analyzers that will measure ultra low.
Is there an APP that can measure the ultra low frequency levels?