The Experts below are selected from a list of 37662 Experts worldwide ranked by ideXlab platform
Thomas J Imig - One of the best experts on this subject based on the ideXlab platform.
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functional organization of Sound direction and Sound Pressure Level in primary auditory cortex of the cat
Journal of Neurophysiology, 1994Co-Authors: Janine C Clarey, Pascal Barone, Thomas J ImigAbstract:1. The functional organization of neuronal tuning to the azimuthal location and Sound Pressure Level (SPL) of noise bursts was studied in high-frequency primary auditory cortex (AI) of barbiturate-...
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single unit selectivity to azimuthal direction and Sound Pressure Level of noise bursts in cat high frequency primary auditory cortex
Journal of Neurophysiology, 1990Co-Authors: Thomas J Imig, W A Irons, F R SamsonAbstract:1. The azimuth and Sound Pressure Level (SPL) selectivities of single-unit responses recorded in primary auditory cortex of barbiturate-anesthetized cats were studied by the use of broadband noise ...
Weileun Fang - One of the best experts on this subject based on the ideXlab platform.
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on the design of piezoelectric mems microspeaker for the Sound Pressure Level enhancement
Sensors and Actuators A-physical, 2020Co-Authors: Hsuhsiang Cheng, Zirong Huang, Yijia Wang, Weileun FangAbstract:Abstract This study aims to design and realize MEMS microspeakers with high Sound Pressure Level (SPL) for in-ear applications. On the basis of high piezoelectric coefficient PZT thin film, the proposed suspension-spring and dual-electrode designs enhance the out-of-plane displacement of central diaphragm to improve low-frequency SPL. The preliminary tests show that both proposed single-curve and dual-curve spring designs have higher low-frequency SPL than that of the reference clamped diaphragm microspeaker. Measured in the standard ear simulator systems with 2 Vpp driving voltage, the proposed dual-curve spring design demonstrates good performance at low frequencies. At the resonant frequency of 1.85 kHz, the dual-curve spring design is 28 dB SPL higher than the clamped diaphragm. In addition, from 100 Hz to 3 kHz, more than 10 dB SPL enhancement is achieved. Furthermore, the total harmonic distortion (THD) of dual-curve spring design is less than 2% in most of the audio range. Compared with the published literature of piezoelectric MEMS microspeakers, this study shows a reasonable SPL with the smallest diaphragm area of 1 mm2.
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piezoelectric mems microspeaker with suspension springs and dual electrode to enhance Sound Pressure Level
International Conference on Micro Electro Mechanical Systems, 2019Co-Authors: Hsuhsiang Cheng, Zirong Huang, Yijia Wang, Weileun FangAbstract:This study based on piezoelectric actuating principle to design and realize a high Sound Pressure Level (SPL) MEMS microspeaker for in-ear applications. The proposed suspension-spring design enables larger out-of-plane displacement to improve SPL and the piston movement of diaphragm to generate Sound waves with better quality. Moreover, applying dual electrode pattern on the suspension springs further enhances diaphragm out-of-plane displacement and SPL. Measurements demonstrate the highest SPL above 100dB at 3.13kHz in a 3cm long canal. SPL higher than 70dB is obtained from 400Hz to 8.5kHz with only 2V pp driving voltage and 1.67mm2 diaphragm. Furthermore, total harmonic distortion (THD) is less than 3% in most of the audio range.
F R Samson - One of the best experts on this subject based on the ideXlab platform.
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single unit selectivity to azimuthal direction and Sound Pressure Level of noise bursts in cat high frequency primary auditory cortex
Journal of Neurophysiology, 1990Co-Authors: Thomas J Imig, W A Irons, F R SamsonAbstract:1. The azimuth and Sound Pressure Level (SPL) selectivities of single-unit responses recorded in primary auditory cortex of barbiturate-anesthetized cats were studied by the use of broadband noise ...
Hsuhsiang Cheng - One of the best experts on this subject based on the ideXlab platform.
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on the design of piezoelectric mems microspeaker for the Sound Pressure Level enhancement
Sensors and Actuators A-physical, 2020Co-Authors: Hsuhsiang Cheng, Zirong Huang, Yijia Wang, Weileun FangAbstract:Abstract This study aims to design and realize MEMS microspeakers with high Sound Pressure Level (SPL) for in-ear applications. On the basis of high piezoelectric coefficient PZT thin film, the proposed suspension-spring and dual-electrode designs enhance the out-of-plane displacement of central diaphragm to improve low-frequency SPL. The preliminary tests show that both proposed single-curve and dual-curve spring designs have higher low-frequency SPL than that of the reference clamped diaphragm microspeaker. Measured in the standard ear simulator systems with 2 Vpp driving voltage, the proposed dual-curve spring design demonstrates good performance at low frequencies. At the resonant frequency of 1.85 kHz, the dual-curve spring design is 28 dB SPL higher than the clamped diaphragm. In addition, from 100 Hz to 3 kHz, more than 10 dB SPL enhancement is achieved. Furthermore, the total harmonic distortion (THD) of dual-curve spring design is less than 2% in most of the audio range. Compared with the published literature of piezoelectric MEMS microspeakers, this study shows a reasonable SPL with the smallest diaphragm area of 1 mm2.
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piezoelectric mems microspeaker with suspension springs and dual electrode to enhance Sound Pressure Level
International Conference on Micro Electro Mechanical Systems, 2019Co-Authors: Hsuhsiang Cheng, Zirong Huang, Yijia Wang, Weileun FangAbstract:This study based on piezoelectric actuating principle to design and realize a high Sound Pressure Level (SPL) MEMS microspeaker for in-ear applications. The proposed suspension-spring design enables larger out-of-plane displacement to improve SPL and the piston movement of diaphragm to generate Sound waves with better quality. Moreover, applying dual electrode pattern on the suspension springs further enhances diaphragm out-of-plane displacement and SPL. Measurements demonstrate the highest SPL above 100dB at 3.13kHz in a 3cm long canal. SPL higher than 70dB is obtained from 400Hz to 8.5kHz with only 2V pp driving voltage and 1.67mm2 diaphragm. Furthermore, total harmonic distortion (THD) is less than 3% in most of the audio range.
Janine C Clarey - One of the best experts on this subject based on the ideXlab platform.
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functional organization of Sound direction and Sound Pressure Level in primary auditory cortex of the cat
Journal of Neurophysiology, 1994Co-Authors: Janine C Clarey, Pascal Barone, Thomas J ImigAbstract:1. The functional organization of neuronal tuning to the azimuthal location and Sound Pressure Level (SPL) of noise bursts was studied in high-frequency primary auditory cortex (AI) of barbiturate-...