5 results about "Ultra sound" patented technology

A system (100) includes a listening device (105) with a processor (110), memory (112), speaker driver (120), and microphone (130) for determining hearing loss. The memory includes processor-executed instructions (155) for carrying out steps including transmitting an ultrasound tone to a user of the listening device (105); measuring length of an ear canal of the user after receiving a reflected ultrasound signal; transmitting an audible sound to the user of the listening device; transmitting an ultrasound tone to the user of the listening device (105) and measuring length of an ear canal of the user after receiving a reflected ultrasound signal; comparing the measurement of the length of the ear canal before and after the audible sound transmission; and if there is no change or minimal change in the length, notifying the user of hearing loss or controlling the listening device to limit sound level.

The utility model relates to the technical field of exposure machines, in particular to an exposure machine with an automatic dust removal function, which comprises an exposure machine frame, a dust removal device and an exposure system are sequentially arranged on the exposure machine frame, and a reserved interval is arranged between the dust removal device and the exposure system and is used for operation of operators. And the dust collection electrode is connected with the positive electrode of the power supply. When the voltage rises to a certain degree, gas molecules near the discharge electrode are ionized, a large number of electrons and positive ions are generated, dust-containing gas is electrically separated when passing through a high-voltage electrostatic field, dust particles and negative ions are combined to carry negative electricity and then tend to discharge towards the surface of the anode to be deposited, and in order to guarantee that dust on the exposure plate can fully enter air, the exposure effect is good. And through the arrangement of the ultrasonic generator, dust can be in the air under the vibration of ultrasonic audio frequency, so that the dust can be thoroughly adsorbed to the dust collection electrode under the action of static electricity.

A process is disclosed for removing sulfides from liquid fossil fuel comprising mixing the liquid fossil fuel with an oxidizer and catalyst to form a multiphase reaction medium and producing a fluid flow of the multiphase reaction medium. Ultra sound may be applied to the multiphase reaction medium to cause oxidation of sulfides in the liquid fossil fuel to sulfones; and extracting the sulfones to yield an organic phase and aqueous phase. The ultra sound is performed by generating vibrations parallel to the fluid flow of the multiphase reaction medium. The organic phase substantially consists of desulfurized fuel.

The invention discloses an air tightness detection system and method, the air tightness detection system comprises a box body, a sound generation unit and a detection unit, the sound generation unit comprises an inflation unit, the inflation unit is located outside the box body, the inflation unit is communicated with the box body, and the inflation unit is configured to inflate gas into the box body to generate ultrasonic waves; the detection unit is arranged outside the box body and is configured to detect ultrasonic audio parameters generated by the box body and compare the ultrasonic audio parameters with preset parameters. According to the scheme provided by the invention, the box body is inflated through the inflation unit to generate ultrasound, at the moment, the detection unit detects the corresponding ultrasonic audio parameter and compares the ultrasonic audio parameter with the preset parameter, and when the ultrasonic audio parameter is greater than the preset parameter, the airtightness of the box body is judged to be invalid, so that the overall detection process is simple, the efficiency is high, and the detection accuracy is high. And convenience is brought to detection personnel.

The invention discloses an intelligent anti-recording method and system, and the method comprises the steps: obtaining an audio signal; matching the audio signal with a preset condition; and when the audio signal satisfies a preset condition, an interference signal which interferes with the recording device is played according to a preset control strategy, and the interference signal is one group or multiple groups of ultrasonic audio signals. Therefore, recording prevention measures can be started when the audio signal meets the preset condition so as to interfere the working environment of the recording equipment and enable the recording equipment not to normally record in the signal acquisition process.