listening room

DATE: 2022-09-17 16:12:38

Item The concept of audition room (listening room, listening room)
Our technicians have more than ten years of experience in research, development, design and
production of listening rooms (audition rooms), noise testing rooms and anechoic rooms (semi-
anechoic rooms). According to the special requirements and product characteristics of customers
in noise testing room and anechoic room, the company can provide complete measuring
systems, laboratories and customized non-standard measuring devices.
According to rec. ITU-r bs.1116-1 recommendation ITU-T bs.1116-1Methods for the objective
assessment of small expenses in audio systems including multichannel sound systems ",within
the test frequency range, the sound pressure level of background noise is at least 6dB lower than
that of the sound source to be tested, preferably 15dB lower.
Evaluation method of noise testing room:
According to the international standard rec. ITU-T bs.1116-1 recommendation ITU-r bs.1116-1
methods for the objective assessment of small expenses in audio systems including ulti channel
sound systems .
Acoustic performance parameters of listening room (audition room)
The noise floor in the listening room (audition room)LA≤25 dB (A);
The external dimensions and internal dimensions shall be designed according to standards as
required.
Environmental noise status and sound insulation index of listening room (audition room)
1. Present situation of environmental noise in listening room (audition room)
The ambient noise around the listening room (audition room) is not more than 55dB(A).
2. Sound insulation index of listening room (audition room)
To ensure that the background noise LP of the listening room (audition room) is s 25 dB (A), the
sound insulation of the enclosure structures such as the wall, ceiling and door of the noise testing
roomaLP isz 30 dB (A). (4Lp= 50-20= 30dB(A))
Civil engineering and sound insulation treatment scheme of listening room (listening room)
To ensure the noise floor of the listening room (audition room):
The listening room (audition room) should adopt the acoustic structure of frequency conversion,
multiple sound insulation, sound absorption and silencing. It adopts the patented composite
structure of "Danpin" turbocharging microcirculation frequency conversion sound insulation,
noise elimination and sound absorption, patent number: 200520108948.5.
1. GB/T 6882-2016 "Measurement of sound power level of acoustic noise sources", Precision
method of anechoic chamber and semi-anechoic chamber;
2. ISO3745: 2012 Acoustics-Determination of sound power levels of noise sources using sound
pressure-Precision methods for anechoic and hemi-anechoic rooms, namely ISO 3745
"Acoustics-Determination of sound power level of noise sources-Precision measurement method
of anechoic room and semi-anechoic room";
3. JJF 1147 Specification for Calibration ofAcoustic Characteristics ofAnechoic Rooms and
Semi-anechoic Rooms;
4. GB/T 18883-2002 Indoor Air Quality Standard;
5. GBT4214.1-2000 Noise Test Methods for Household Appliances and Similar Appliances Part 1;
6. GBJ118-88 Code for Design of Sound Insulation of Civil Buildings;
7. GB3096-2008 Sound Environment Quality Standard;
8. GB50356-2005 Code for Architectural Acoustics Design of Theater, Cinema and Multi-purpose
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