Acoustics

Meeting the acoustic requirements of telephones, mobile phones as well as VoIP applications is a precondition to obtain a good voice quality and syllable articulation. The same applies to music players, headsets or earphones, where the acoustical compliance determines the final sound performance.

CETECOM is accredited for the testing of sound system equipment and voice performance, amongst others specializing in the testing of Acoustical Quality Evaluation for mobile terminals. The acoustic tests are carried out in automatic test sites equipped with a state-of-the-art acoustic chamber. The acoustic test report of CETECOM are recognized by many countries all over the world as a basis for type-approval procedures.  

Test spectrum

CETECOM's scope of acoustical measurements include following testing services. Further tests can be carried out on demand. Depending on the requirements the acoustic tests are complied by using either the “Test Head Coupler Type 1” or the “HATS” (head and torso simulator).

• Voice quality
  by using background noise simulation and data base (EG 202 396-1):
  PESQ and TOSQA algorithms (50 real background noise conditions)
  
  • cell phone network operator specs
    (Vodafone, T-Mobile, etc.)
  • New generation DECT specs *
    (EN 300 175-8)
  • Voice-over-IP specs
    (EG 202 737...EG 202 740)
• HAC
  
  • FCC: CFR 47 Part 68 IC
    USA (analogue PSTN phones)
  • IC CS-03 Part A
    Canada (analogue PSTN phones)
  • AS/ACIF S040
    Australia
• Acoustic Requirements:
  • TS 26 131/ -132
    UMTS mobile phones
  • I-ETS 300 175-8
    acoustic shock and wideband speech
  • EG 202 518
    acoustic output of terminal equipment
  • EN 50 332-1/ -2
    Max. sound pressure level and limit considerations for head- and earphones
  • TBR 10
    DECT telephones (analogue/digital access) 
  • TBR 38
    telephones (analogue access) 
  • TBR 8
    telephones (EURO-ISDN basic access)
  • TIA/EIA-810-B
    USA: VoIP feature phones narrowband 
  • TIA-920
    USA: VoIP feature phones wideband 
  • AS/ACIF S004
    Australia

DECT Forum

CETECOM is the official certification body of the international DECT/CAT-iq Forum, which represents the interests of the DECT/CAT-iq industry by allocating the CAT-iq logo. The CAT-iq logo is a quality seal which stands for excellent audio performance und interoperability between DECT/VoIP terminals and the Web 2.0 standard. Please visit www.dect.org or click on the following link for more information on CETECOM's testing and certification services for DECT applications.