Voice of reason heard the so-called "voice" is conductive material such as mutual vibrations in the tympanic membrane vibrations in the air such as the human cardiology ELITE I stethoscope ear, into the brain currents, people on the "listen" to the sound. Where people can feel the vibration of the ear frequency 20-20KHZ.
People feel the standard of sound and a is the volume, and the wavelength, the intensity of normal human hearing range is 0dB-140dB. Fetal Stethoscope
In other words: the audio range are too weak to hear the sound too loud, within the audio volume is too small (low-frequency waves) or too large (high-frequency waves master cardiology Stethoscope, Class III Stethoscope) can not hear.
One can hear the sound Cardiology master stethoscope and the environment is also related to the human ear has shielding effect is that strong voice to cover the weak sound.
The sound inside the body such as heartbeat Class II stethoscope, bowel sounds, wet rales, etc. is not even the sound of blood flow can make people "listen" to because the audio is too low or the volume is too small or obscured out noisy environments. Stethoscope principle is involved in material transfer between the vibration of the aluminum stethoscope, and Single head Stainless steel stethoscope a single non-air, changing the sound frequency, wavelength, to the human ear "comfortable" range, while shielding the other voice, "listen" more clear.
Our company has paid much attention to its internal management and invested substantially in technology. Presently, it possesses such production equipment as advanced computer injector,hydraulic press, vulcanizer high-speed punch etc. Moreover, our company is equipped with a Mold Cardiology stethoscope Center and a processing center, as well as some advanc-ed mold processing equipment lide numerically controlled lathe. Our company has persisted in the principle off ’Quality First, Customer Satisfied’ beijing escort and has continuously pursued its own development to perfect to serve ourCardiology Master stethoscope customers of a wide range sincerely.