Professional audio professional audio profile
Professional audio by the sound source (music playback device, pickup device that is the microphone), control equipment (analog or digital mixer), audio processor (previously used effects, equalizer, compression limiter, divider, signal Dispensers, delay devices and other peripheral equipment, and now there are more than the integration of the functions of the digital system controller), power amplifier (amplifier), composed of speakers. The above equipment by various types of different wires, cables used in series together.
Professional audio equipment for users with high demands on the function of various equipment and use are very understanding, with professional theoretical knowledge, accurate listening ability, strong debugging level, emphasizing fault diagnosis and troubleshooting capabilities. The difficulty lies in the system design and debugging.
The use of professional audio
Acoustic characteristics of professional audio not only to meet the requirements of national standards for acoustic properties, but also to meet the requirements of subjective listening, because the acoustic characteristics of indicators can not fully reflect the actual sound effects, the sound quality is ultimately subjective listening feeling Decided that in the acoustic design, electro-acoustic and sound design should be well-designed to meet the following subjective listening requirements: the appropriate loudness.
Loudness is the actual sense of the strength of listening, it is the maximum sound pressure level of sound reinforcement system has a direct relationship between the indicators, for the performance is concerned, only to achieve sufficient loudness in order to make full sound performance. System output power, speaker placement will directly determine the listening area loudness state: high-definition.
When speaking as a speaker, the clarity of the language must be ensured, and the effect of the speech can be affected if one does not hear the speaker's language. Therefore, in the design of electro-acoustic system to fully consider improving the language clarity: sufficient fullness.
With a good fullness of the performance results, you can make the human voice full, vigorous, melodious music active. In the electro-acoustic system, only through the use of audio peripheral equipment for sound signal processing and reasonable use of sound these measures, the fullness of the sound can meet the requirements. Acoustic characteristics of sound reinforcement system Acoustic computer aided design is the use of modern technical means to engage in engineering design of an ideal way, high precision, high efficiency, more importantly, do not have to wait until the end of the installation and commissioning will be able to know the results of engineering design. Acoustic characteristics Computer design system has very good credibility and accuracy, in the input hall of the building sound data is accurate enough, the calculated data and the final electro-acoustic measured results compared to the error can be controlled within the decibels. This is sufficient for engineering design and installation and commissioning, and it has good design, installation and debugging guidance, which has been well verified in the previous engineering design. The acoustics CAD system is used to design and calculate the acoustics characteristics of the auditorium, gymnasium, multi-function hall and auditorium sound reinforcement system. This means that the design and installation are not necessary until the system is installed, debugged and measured. Debugging results. In other words, according to the design of the audio system and the design calculation results, has been clearly seen in the system of the sound reinforcement system of acoustic characteristics.
Terminology for professional sound
1, sound pressure level
Refers to the actual sound pressure and reference sound pressure ratio of 20 times the logarithm, the unit is decibels. Is a measure of sound system sound situation, sound reinforcement of the acoustic quality indicators of the important indicators.
2, sound reinforcement power
PA power is the rated power required for the PA system when it reaches the rated PSL of the system. Its unit is tile. Is the acoustic parameters in the direct expression of the acoustic parameters, and it will be related to the final project cost, so it is particularly important.
3, hum
50 Hz alternating current sound, because the sound is similar to the name of hum and low frequency, audio equipment, power ripple factor is too large and poor anti-jamming performance will lead to hum.
4, pure tone
The sound of a sinusoidal signal is audibly a sound with a distinct single tone, such as the sound emitted by the tuning fork.
5, intermodulation distortion
Intermodulation distortion refers to a signal distortion of a new frequency component resulting from the mixing of two amplitudes of a single audio signal by a certain ratio (usually 4: 1) through the playback device.
6, octave
The frequency between the two frequencies is 2, the octave between the octave of the octave relationship, that is, for every doubling of the frequency, the pitch increased by an octave.
Professional audio and home audio difference
Professional audio and home audio difference is the use of different occasions. Home audio is generally used for home playback, which is characterized by sound soft and delicate playback, appearance is more refined, beautiful, sound pressure level is not too high to bear the power is relatively small. Professional audio is generally used in dance halls, karaoke OK hall, theaters, halls and sports venues and other professional entertainment venues. General professional audio sensitivity is high, playback sound pressure, strength, and withstand power, compared with the home audio, the sound quality is hard, appearance is not very delicate. But in the professional audio monitor speakers, the performance and home audio is relatively close to the general appearance is also more sophisticated, compact, so this type of monitoring is also often used in home Hi-Fi sound system used.
