Lab Language system HLS320

I) Teacher part a. Signal amplification and processing: Parameter: + Power supply:AC 220±5%V/50Hz + Voltage:DC+12V + Minimum temperature:-5oC —40oC + Frequency:125—10000Hz±2dB + Maximum number: 120 students + S/N signal/noise ratio: ≥60dB + Program crosstalk: ≥ 60db + Distortion rate: ≤1% + System: ≤150 b. Power supply for the system: Parameters: + Frequency response: 50Hz~10 Khz + Output signal: 1 VPP + Sensitivity: -40 dB + Total harmonic distortion: ≤3.5% + Signal/noise ratio: MIC > 44dB + AUX > 44 dB + Transfer rate: 38400/bit + AUX input + Linear in: 4x 47 KΩ/500mV + Linear out: 1x 10 KΩ/500mV Teacher Cassette recorder: + Built-in LCD screen displays all control functions when using programs; Simultaneous integration of USB port and SD card port to play teaching materials. + Process and provide audio source for teacher and students from USB or SD memory card + The stereo recorder and player ( one A channel, one B channel (optional with expander channel tape)) + LED screen + Reading MP3 + Tape speed: 4.76cm / s + Line in: -10dB, 47kΩ + Line out: 0dB, 16Ω + 8 volume level,adjustable by buttons ,teacher software + Zero out for counting + Bookmark：5 bookmarks available + Controll with 4 speed: REC、PLAY、FFW、REW、STOP/EJECT、PAUSE + Record mutually between two cassettes + voice control and gap function + USB and SD card slot + Power supply: DC 15v 50Hz + Power consumption: ≤8w The software system: + Easy to use graphical interface with functions of control, management and communication with students, separately showing 3 teaching modes, multiple-choice exams, audio source library. Sample student mode for the whole class or for 1 other student. + Multi-dimensional conversations. + Available to adjust the seat quantity on main software + according to actuality, range from 1 to 192 seats + Adopt to AA.AAC full compatible technology, which is + easy to upgrade for school + Dual control by teacher computer + Adjustable play speed + SP gap function + SP，SPS，SSP，SPSPS play function + Long time live recording + 3 audio channel for switch + 8 audio channel input + Automatically repeat function + Mutual recording between two main recorders + monitor recording function + Standard examination function + Audition test function + System self-detection + Rll call function + Voice teaching part + Dual teaching：Dual control by computer and mobile keyboard.If computer work too long time or too frequent,control by mobile keyboard separately. + Small group meeting：system divide the the class into 2 students one group or several groups.inside the group,the students can talk with each + other,and no interfere among groups + Big group meeting：system divide the the class into several big groups.inside the group,the students can talk with each other,and no interfere among groups + Student demonstration：teacher can appoint one or several student to demonstrate to all class。 + Seat edition：teacher can edit the seat number to student real name. ALL CALL：Teacher can have class to all students + Listen to program：teacher can authorize student to choose one program by themselves + Chime In：Teacher can explain to one program,and student can hear the explanation and program at the same time。 + Speaker：available to output the sound to external speakers + Monitor recording：teacher can record the program that student listen during self-study。 + Monitor：Teacher can monitor one student,also can set cycle time to monitor all students. + Talk： Teacher can talk with students,also can appoint two or more students to talk with each other + Locked program：Teacher can force student to listen one program. Set time：Teacher can set class time and examination time 2)．Multi-media part + Connected external speakers + Available to control 3 A&V input channel,choose one output channel 7 + Available to control one VGA signal to output to projector or other output device + 3．Examination and analysis function + The system has powerful examination function,available to have random test,A,B paper test,and evaluate the result. II) Students part Students terminal/Amplifier students: + Frequency: 100Hz-4KHz + S/N signal/noise ratio: ≥55dB + Deformation Rate:≤3% + The student device block has 15 function keys, including 5 keys A, B, C, D, E for participation & multiple-choice tests + 3.2-inch LCD screen to display HS seating information, multiple-choice answers, audio broadcast channels,... Optional: + The student machine can extender with connect USB or RJ11 port + The protection function, the screen saver mode allows to protect the device at the end of a lesson, allows alarms via smartphones ( android and iOS) to alarm when students open the screen or dismantle the device when the teacher is not in class, allowing teacher to share content to notify others when the teacher is on business. The headset: + Headset model: Headshot type, stereo + Microphone: noise suppression type + Headphones with a headbracket + Headphone: + Sensitivity: -42 dB±2 dB + Frequency Range: 30 to 16,000Hz + Impedance: 16Ω + Rated Power: 150mw + Microphone: + Sensitivity: 118dB±3 dB + Frequency Response: 200 to 5,000Hz + Impedance: 1.5K-2KΩ + Directivity: 20-20KHz + Cable length: 2m / 2.4m Cable connecting: + Cable connecting standard + Device that converts and communicates student data analysis with teachers Optional: Mobiview use for teacher or students control and writing (optional): + Dimension: 11in x 10.4 in + Active dimension: 8in x 5in + Weight: 1.9lbs + Resolution: 1,000 points (lines) per inch + LCD 4.3 in Color TFT, build in resistive touch screen (writng by ben or finger) + The software workspace + Assemble: China