【 Weak current College 】 audio equipment and system knowledge-Power By 【 China power house network 】

1. compressor main protection role is to protect the speakers
2. play disco dance, equalizer, suitable for bass strongly enhance treble appropriate
3. singing karaoke effects program choose more often DELAY
4. singing with Canto, effects the program choose more often LARGE HALL
5. the actuator in sound reinforcement system to beautify the tone effect
6. the compressor could change the dynamic range of sound reinforcement system features 7. Equalizer can change sound reinforcement system's frequency response 8. sound, to increase the treble, should adjust the TREBLE sound mixer
9. in order to highlight the human voice, baritone, should you want to promote adjustment of the MID sound mixer
10. in order to enhance vibration sense, but to enhance bass, should adjust the BASS sound mixer
11. to move around the singer of sound and image orientation, should adjust the PAN mixer
12. the mixer's PEAK led indicate peak
13.PEAK lamp long light should be adjusted appropriately reduce the GAIN
14. normally, change size of output sound from the speakers, to adjust the FADER mixer
15. the equalizer is typically connected in a mixer and amplifier between
16. the results are usually connected to the mixer EFFIN and between EFFOUT
17. the compressor is usually connected to the mixer and amplifier between
18. According to bell curve, such as music appreciation should adjust the volume right up to the high and bass are very plump
19. sound system's frequency characteristic refers to the frequency signal on a large number of non-uniformity
20. play cowboy, Samba, dance, rhythm of the equalizer for bass, treble appropriate strongly promoted
21. singing songs, singing with popular, choose more often DELAY effects program
22. Bel effects program choose more often LARGEHALL
23. the Expander in megaphone system up to the extended dynamic range function
24. the tone controller can change sound reinforcement system's frequency response
25. the Denoiser can change sound reinforcement system of SNR characteristics
26. compressor features the highest level is compressed and the lowest level of the relative change between the
27. the Extender on signal processing is to reduce the gain of a weak signal
28. compressor on signal processing is the compression of the maximum levels and minimum-level changes in the range between
29. the dynamic range is a signal of the maximum levels and minimum-level changes in the range between
30. the Aural Exciter's main function is used to beautify the appropriate Add harmonic timbre
31. the Denoiser's main function is to reduce tape noise
32. the complementarity of Denoiser on signal processing is to be extended after compression
33. various types of audio signal source, SNR worst device is the tape recorder
34. the compressor of the compression ratio achieved greater than 10: 1 the limiter
35. compression-compression ratio is the input level to increase the number of decibels and output level to increase the ratio of the number of decibels
36. noise gate's main function is to reduce noise without signal
37. the feedback suppressor's main function is to suppress the voice of positive feedback
38. in order to protect the power amplifier and speaker, compressor is usually placed in the equalizer and amplifier between 39. Press Equalizer HighCUT button, you can reduce the high frequency hissing noise
40. Press Equalizer LOWCUT button, you can reduce low frequency hum
41. in order to make the speech sound loud, usually at the same time press the HighCut and LowCu42. in order to protect the speakers and amplifier, rely primarily on compression device
43. in order to suppress acoustic feedback caused by screech, rely primarily on the equalizer
44. singing karaoke to increase sound full grown, rely primarily on effects
45. the actuator can supplement the original sound of harmonic, increase transparency and proximity of music are
46. use actuator reinforced music bass components, you should use its accent processing BIGBOTTOM channel. 4f"GpmW0ijy
47. to change the bass of the intensity and duration, should adjust the actuator accent processing channels in GIRTH, OVERHANG knob
48. compressor RATIO of compression ratio, usually selected value will be 2: 1-1-3:
49. the compressor's significance as a ReleaseTime recovery time, usually chosen value more than 500ms
50. the significance of the compressor to start AttackTime, usually chosen values 1-5ms
51. compressor GateThreshold significance threshold for compression
52. the compressor has the "breathing space" effect may be due to the recovery time too short
53. compressor appear unnatural "tone head increase" is usually due excessively long boot time
54. the professional audio and home audio system in combination with the main difference is that the more the sound mixer 55. impact sound system replay sound quality is good or bad is speaker of key equipment
56. the audio tones in the onsite show yinyuan actions most frequently tuning device is a sound mixer
57. the audio system for acoustic debug, such as producing howl when adjusting the equalizer
58. the audio system to avoid speakers and amplifier overload of major equipment is compression device
59. in addition to the speaker, the sound quality to show the effect of the larger equipment is the microphone
60. professional audio systems most easily damaged device is speaker
61. a professional audio system efficiency is the lowest equipment box
62. professional audio system, distortion rate maximum device is a speaker
63. the professional audio system, the power consumption of the device is a maximum power amplifier
64. the audio system, the electrical energy is converted into sound energy device is a speaker
65. the audio system, the sound energy into electrical energy of the device is a microphone
66. the sound system, able to drive the speaker device is power amplifier
67. the audio system, the technology mature, theSpecification maximum device is power amplifier
68. The preamplifier and power amplifier is the predecessor of the main Division is responsible for zoom in and control, power amplifier for Zoom
69. the accurate measurement of professional power amplifier output power indicator is the maximum output power without distortion
70. DB represents the amplifier power gain formula is 10lg (output/input power)
71. the professional recording system mainly includes radio and TV stations, film studios, audio-visual company Studio equipment
72. professional auditorium sound amplifying system mainly includes Hall, Conference Hall, theater, and dance halls of audio equipment
73. public broadcasting system including restaurants, shopping malls, hotels, parks of background sound and fire radio
74. recording deck, opening the recorder voice records belong to the magnetic recording
75. film copies of sound recordings are optical recording
76.CD, LD, DVD sound record belongs to the laser digital recording
77.LP dense pattern recording voice records belong to the mechanical recording
78. harmonic distortion factor is defined as the sum of squares of harmonic voltage RMS square wave voltage divided by the matrix of valid values
79. the power amplifier damping coefficient DF is equal to the rated load impedance and the output resistance ratio 80. amplifier, the greater the damping coefficient, the speaker resonance suppression capability
81. General power amplifier of damping coefficient values to select 15 ~ 100
82. The preamplifier PHONOIN input matching requirements as input 1 ~ 10mV, RIAA equalization networks
83. The preamplifier MICIN input matching requirements as input 1 ~ 10mV, straight balanced characteristics
84. The preamplifier TAPEIN input matching requirements to enter 0.5 ~ 2V, straight balanced characteristics
> 85. The preamplifier CDIN input matching requirements to enter 0.5 ~ 2V, straight balanced characteristics
86. The preamplifier input matches the requirements of AUXIN as input 0.5 ~ 2V, straight balanced characteristics
87. The preamplifier TUNERIN input matching requirements to enter 0.5 ~ 2V, straight balanced characteristics
88. The preamplifier input matching requirements LINEIN to enter 0.5 ~ 2V, straight balanced characteristics
89. The preamplifier in Loudness function is loudness control, with the amplifier's volume to signal of high hour bass to compensation
90. The preamplifier features in Volume is the volume control, change the amplifier gain size 91. preamplifiers in Treble\Bass function is the pitch control, change the ratio of the treble, the Bass Amplifier
92. The preamplifier features in Balance is the balance control, adjust the left and right channels of a stereo amplifier relative volume output 93. amplifier HPF circuit's main function is the high-pass filter to filter out low frequency noise 100Hz following 94. amplifier in the main features of LPF circuit is low-pass filter to filter out high frequency noise 5KHZ above
95. amplifier LOW CUT circuit's main function is the high-pass filter to filter out low frequency noise 100HZ following
96. amplifier HIGH CUT circuit is low pass filter to filter out high frequency noise 5KHZ above
97.OTL circuit output power of formula is (voltage) 2/8X load resistance 98.OCL circuit output power of formula is (voltage) 2/2X load resistance
99.BTL circuit output power of formula is (voltage) 2/load resistance
100.OCL circuit to eliminate switch machine instant impact on the speakers, the approach is to delay switching relays
101.OCL circuit fore using differential amplification circuit's main purpose is to overcome the zero point drift
102.OCL circuit bootstrap capacitor's main role is to improve the amplifier gain
103. the OCL circuit amplifier tube sets certain offset voltage of main role is to reduce the crossover distortion
104. the OCL circuit amplifier tubes emitter series negative feedback resistor is stable operating point
105. the BTL circuit in the power supply voltage and load unchanged conditions, its output power is 4 times the OCL circuit
106. the speaker protection circuit's main function is to prevent direct current to flow into the speaker burn out
107. ① ② tape recording, player ③ L P C D player three contrast, high and low-noise indicators to sort; ① ② ③;
108. ① ② tape recording, player, L P C D player ③, comparison of the three, the sort of earthquake performance; for ① ② ③; 109. ① ② L tape recording, player, ③ P C D player, contrast, size of reproducing rate as ① ② sorted;; ③
110. ① ② tape recording, player, L P C D player, ③ three contrast the sort of frequency response indicators as ① ② ③;;
111. ① ② tape recording, player, L P C D player, ③ three contrast, high and low harmonic distortion as the sort; ② ③; ①
112. ① ② tape recording, player, L P C D player ③, comparison of the three, the program saves the life of the length of the sort for ① ② ③;;.
113. the flutter is the record player or cassette recorder produces output signal sound cyclical variation of frequency
114. the CD player in SKIP symbol indicates that the jump music
115. the CD player in the REPEAT symbol represents a repeat on singing
116. the CD player in the INTRO notation Overture sweep
117. the CD player in a PROGRAM symbol indicates that the programming
118. the effect of DEPTH symbol represents depth
119. effect of ATTACK symbol indicates that the establishment of
120. the effects of PROCESSOR notation processorsR>121. Effect of RELEASE symbol indicates that the recovery
122. the effects of TRG symbol indicates that the trigger
123. the effect of DIFFUSION symbol indicates that the proliferation
124. the effects of RECALL symbol indicates that the call
125. the effect ofFREEZE symbol indicates that the freeze
126. the effects of the symbol indicates that the parameter PARAM
127. the effects of SPACE symbol space
128. the effects of REFLECTION symbol indicates that the reflection
129. the effects of choral CHORUS notation
130. the complementarity principle of noise reduction is recording the signal level is weak, strong signal level lower, when instead handle the playback. Dolby B noise reduction principle is recording compression dynamic range, the weaker high frequency signal, when instead handle the playback
132. the compressor's ATTACK symbol indicates that the boot-time tuning
133. compressor LINK symbol indicates stereo chain switches to enable compression between the left and right channels are connected to 134. Compressor GAINREDUCTION notation gain attenuation, display compressed out of level
135. compressor RELEASE symbol indicates that the recovery time adjustment
136. compressor COMPRATIO symbol indicates that compression ratio
137. compressor THRESHOLD notation up control threshold (threshold)
138. the compressor's COMP symbol indicates that the compression state
139. compressor EXPGATE symbolic representation extended door adjustment
140. the pressure diffuser of SIDECHAIN symbol indicates that the bypass link
141. the pressure diffuser of STERTOCOUPLE notation stereo coupling switch
142. the pressure diffuser of EXPANDERTHRESHOLD symbol indicates that the extended threshold adjustment
143. the pressure diffuser EXPANDERRATIO symbol indicates that the extension of the proportion of regulation 144. Actuator of OVERHANG key function is to regulate is to strengthen the bass content of
145. the actuator's GIRTH key function is to adjust the bass and strengthen effectiveness of the
146. the principle of the actuator is in the original signal frequency area joined the third harmonics-based ingredients
147. the actuator's TUNE key function is to regulate Exciter frequency harmonics of low-frequency limit
148. the actuator's key features is BIGBOTTOM Exciter accents processor
149. the incentive for IN/OUT key function is to switch actuators work or bypass
150. the actuator's key feature is the MIX adjustment effect signal in direct signal proportional to the
151. the primary function of noise gate is multi-channel microphone automatically close when you are working without the normal signal input microphone
152. the feedback suppressor's main function is to suppress the acoustic feedback whistling
153. the primary function of moving the prescaler is suppression system of acoustic feedback whistling
154. Dolby noise reduction circuit's main function is to eliminate background noise tape recorder
155. Cone Speaker playback characteristics, ideal for high, medium, low, more suitable for medium and low frequency playback
156. the Horn speaker playback characteristics suitable for medium and high frequency, more suitable for high frequency playback 157. Ball loudspeaker playback characteristics, suitable for small power, high frequency playback
158. Cone Speaker features a sensitivity of medium, transient characteristics of a medium, power can be very large
159. Horn loudspeakers are chiefly characterized by high sensitivity and point to strong, power medium
160. ball loudspeaker features a sensitivity is low, the power of small, transient characteristics of good
161. the e-modulus prescaler is characterized by the amplifier level, frequency spectrum of the signal received after power amplifier
162. the power divider is characterized by after the amplifier level, frequency spectrum of the signal received the speakers after the
163. e divider basic structure mainly by RC filter circuit, also called active crossover
164. the power divider basic structure is mainly composed of inductance, capacitance and resistance, also known as passive crossover 165. LC-2 crossover circuit calculation formula for L = C =
166. LC II-order two crossover circuit calculation formula for L = C = 167. First-order-frequency circuit of frequency characteristics to-6dB/oct
168. the second sub-type bian back to El-Dyke gear to Halo? 2dB/oct
169. the speaker sound or sound interference is the speaker cone and Sonic cancel each other out, making sound pressure decrease
170. avoid speaker sound interference would be to turn the speaker cone and separated with baffle or place the speakers mounted on the speakers in the
171. the acoustic phenomenon mainly exist in short circuit, Woofer
172. the speaker phase hole in the main role is to use the speakers on the back of the comic wave, phase and radiation into space
173. the narrow strip of phonological and pillar of radiation characteristics of the upper and lower vertical plane directivity is narrow, horizontal directivity wide 174. Allweather directivity and its length and frequency of the sound column length or is the higher the frequency, the stronger its directivity
175. U-frequency wireless microphone features a stable performance, strong anti-interference ability, the number may be more work, but at higher prices
176. V-frequency wireless microphone features a stable performance, should not be more than one at work, less expensive
177. the moving coil microphone features solid and durable, without power, suitable for solo and wind instruments
178. the main features of the capacitor microphone is the treble and transient characteristics of a good, plus power, suitable for chorus, Conference
179. fixed-position willProposed statement, choose more often Gooseneck microphone capacitance cable
180. the relative retention of instrumental songs or choose more often handheld dynamic or capacitor wired microphone
181. the location of the meeting, choose more often leading wireless microphone clamp capacitor
182. sing and dance performances, choose more often headset dynamic or capacitor wireless microphone
183. professional audio features power, sound pressure level is high, for larger sites
184. home audio features power is relatively small, sound pressure level is low, for smaller venues
185. the main indoor sound quality is good or bad sound reinforcement and the two major factors, namely sound amplifying equipment and sound environment
186. the effects of CHORUS that chorus
187. the results for that banded FLANGE
188. the use of language and music auditoria system level specification requirements for maximum sound pressure level for ≥ 98dB
189. singing sound reinforcement system level specification requirements 0.125---4KHZ sound transmission of to ≥-8dB of gain
190. the effects of FREEZE that freeze
191. the effects of TREMOLO said vibrato
192. the use of language and music auditoria system level specification requirements 0.125-4kHz of acoustic gain to ≥-8dB
193. the MIDI interface is used by plug 5-wire plug
194. the nominal rated load impedance 8 Ω for the power amplifier with a nominal impedance 4 Ω speaker connections, called overloaded with
195. the binary code is 0 and 1
196. mixer GainAdjust said gain adjustment in
197. the disco Hall sound reinforcement system level specification requirements for maximum sound pressure level for ≥ 110dB
198. the compression THRESHOLD expressed in the play control threshold
199. karaoke singing sound reinforcement system level specification requirements 1K, 6.3KHZ sound field not uniformity ≤ 8dB
200. wipe wipe with alternating magnetic audio sound current, which frequency is significantly higher than the highest frequency audio
201. the tape recording was the use of tape recorded sounds of remanent magnetization curve
202. the tape recording of sound the highest frequency signal is 20KHz
203. the audio tape erase with the alternating current is fixed
204. the use of AC biasing records sound signal of dynamic range than the DC bias magnetic recording acoustic signal wide dynamic range
205. the recording head gap g fixed, record sound signal limit frequency and tape speed proportional relationship
206. the sound intensity and sound pressure is the square