Abstract: A personal audio system enabling a user to distinguish approximate locations of sound sources comprises at least one sound receiver. The sound receiver comprises a sound collecting structure for collecting sound. The sound collecting structure comprises a plurality of sound passages opening toward different directions and with different sizes to collect sound waves from the environment. The different sizes of the openings render a decline or an increase in specific frequency ranges of sound as a result of different resonances via the different openings. The user may therefore distinguish the direction of a sound source based on the slightly different pitches (frequencies) of the sound.

Abstract: The present disclosure relates to a disk-type brushless direct current (BLDC) motor, which comprises a magnetic rotor and a stator. The magnetic rotor is provided with a rim and a plurality of equally spaced magnetic poles around the rim in circumferential direction. The stator is provided with a stator core having tooth portions and boot portions and a plurality of coil windings wrapped around the tooth portions. The stator is disposed radially in relation to the magnetic rotor such that the magnetic poles are radially polarized to produce radial magnetic flux density, and the magnetic flux density is substantially higher at both edges than middle portion of each magnetic pole in the circumferential direction.

Abstract: A transducer module includes a signal input unit and at least one transducer. The signal input unit receives an audio signal and transmit the audio signal to the transducer. The transducer comprises a coil configured for generating a variable magnetic field corresponding to the audio signal. A sound delivery device comprises a signal input unit, a signal processing unit, at least one transducer and at least one speaker. The signal input unit receives an audio signal and transmits the audio signal to the signal processing unit. The signal processing unit is configured to process the audio signal and transmit the processed audio signal to the transducer and speaker. The transducer comprises a coil configured for generating a variable magnetic field corresponding to the processed audio signal, and the speaker generates a sound corresponding to the processed audio signal.

Abstract: A personal audio system enabling a user to distinguish approximate locations of sound sources comprises at least one sound receiver. The sound receiver comprises a sound collecting structure for collecting sound. The sound collecting structure comprises a plurality of sound passages opening toward different directions and with different sizes to collect sound waves from the environment. The different sizes of the openings render a decline or an increase in specific frequency ranges of sound as a result of different resonances via the different openings. The user may therefore distinguish the direction of a sound source based on the slightly different pitches (frequencies) of the sound.

Abstract: An airbag safety system is provided with two or more safety airbags which can be adjoined to protect the rider when a crash occurs. A stabilizing mechanism is used to cause the inflated airbags to adjoin each other so as to form a stable protection space between the vehicle and the adjoined airbags. The adjoined airbags are shaped to meet a rider's ergonomics, making sure the rider can be caped for head protection and can be protected within the space surrounded by the airbags from being thrown away off the vehicle and subject to serious injuries.

Abstract: The present disclosure relates to a disk-type brushless direct current (BLDC) motor, which comprises a magnetic rotor and a stator. The magnetic rotor is provided with a rim and a plurality of equally spaced magnetic poles around the rim in circumferential direction. The stator is provided with a stator core having tooth portions and boot portions and a plurality of coil windings wrapped around the tooth portions. The stator is disposed radially in relation to the magnetic rotor such that the magnetic poles are radially polarized to produce radial magnetic flux density, and the magnetic flux density is substantially higher at both edges than middle portion of each magnetic pole in the circumferential direction.

Abstract: An airbag safety system is provided with two or more safety airbags which can be adjoined to protect the rider when a crash occurs. A stabilizing mechanism is used to cause the inflated airbags to adjoin each other so as to form a stable protection space between the vehicle and the adjoined airbags. The adjoined airbags are shaped to meet a rider's ergonomics, making sure the rider can be caped for head protection and can be protected within the space surrounded by the airbags from being thrown away off the vehicle and subject to serious injuries.

Abstract: A sewage treatment system is revealed. Water with contaminants is drawn from sources to the sewage treatment system for automatic and fast water purification. Thus clean drinking water is generated. The water with contaminants is sent to a treatment tank by a motor. Then non-toxic and odorless chemicals are sprayed in the treatment tank. By stirring and mixing of movable blades, the contaminants are coagulated and precipitated into a funnel under the treatment tank to be discharged. Next clean water in the treatment tank is sent to a centrifuge separator to be filtered and dehydrated by centrifugation. Water comes out from the centrifuge separator is drinking water. The sewage is converted into clean water. The system can provide clean safe drinking water to regions without water treatment plants.

Abstract: A sewage treatment system is revealed. Water with contaminants is drawn from sources to the sewage treatment system for automatic and fast water purification. Thus clean drinking water is generated. The water with contaminants is sent to a treatment tank by a motor. Then non-toxic and odorless chemicals are sprayed in the treatment tank. By stirring and mixing of movable blades, the contaminants are coagulated and precipitated into a funnel under the treatment tank to be discharged. Next clean water in the treatment tank is sent to a centrifuge separator to be filtered and dehydrated by centrifugation. Water comes out from the centrifuge separator is drinking water. The sewage is converted into clean water. The system can provide clean safe drinking water to regions without water treatment plants.

Abstract: A conductive yarn and a cloth containing the same are revealed. A plurality of fibers is wound with a heating element in a spiral form so as to form a yarn with electrical conductivity and flexibility. The conductive yarn is used as a thread in a first direction while regular yarns with conductive metal wires arranged at the two sides thereof are used as threads in a second direction. Thus the threads are woven into a cloth that generates heat while being conducted with electricity. Thereby the cloth can be made into mattress, curtains, textile wall coverings, oversleeves, knee braces, waist supports, foot pads, seat cushions, and carpets etc so as to replace various heating equipment.