Because of their increased wavelength (nearly 20 meters at 20 Hz), achieving high output at low frequencies usually requires large drivers (subwoofers). Headphones or earbuds, have less trouble playing back those low frequencies despite their small size: by sealing your ear canal, they create a volume that acts as a pressure chamber. This phenomenon is totally different from what you hear when listening to a speaker playing in the open air. Without the cabin effect — another name for the same phenomenon — earbuds would produce hardly any bass.
There are potential side effects to testosterone replacement therapy. Men who may have breast cancer or prostate cancer should not undergo testosterone replacement therapy. There has been some controversy about whether the treatment may increase the risk of developing prostate cancer. In addition, it may increase your risk for cardiovascular events, obstructive sleep apnea, and excess red blood cell production. It’s worth having a conversation with your doctor about the latest research, as well as the risks and benefits of testosterone therapy.
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