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Sound isolation tested STC 45 acoustic steel door Sound isolation tested STC 45 acoustic steel door Sound isolation tested STC 45 acoustic steel door Sound isolation tested STC 45 acoustic steel door

Homein Sound isolation tested STC 45 acoustic steel door

MOQ: 1PCS Custom Size Fast Delivery Quality Assurance
  • Item NO.:

    CMD06
  • Door Type.:

    Single door, swing door
  • Material

    Galvanized Steel + acoustic core
  • Application:

    Studio,Conference Rooms etc.
  • Color:

    Powder-coating,Grey
  • Design:

    Flush door
  • Style:

    Modern
  • Lead Time:

    20 days
  • Suppliy ability:

    500pcs per month
  • Place of Origin:

    Yongkang city, China
  • Certificate:

    STC 45
  • Ref Price:

    200 USD

STC 45 Acoustic Steel Door SGS Test Data by Homein

Homein’s STC 45 acoustic steel door has undergone third-party testing by SGS, a globally recognized inspection and certification company. The door achieved an STC rating of 45, confirming its ability to effectively reduce noise transmission by up to 45 decibels. The SGS test report verifies:


test report of acoustic door

Frequency (Hz)Transmission Loss (dB)Remarks
10035.7Lower TL at low frequency; typical for doors
12540.5Improved TL at low-bass range
16039.0Slight dip, but still good
20039.7Stable response in low-mid range
25042.6Strong performance starting here
31544.4Increasing TL, effective in mid-range
40045.8High TL in speech frequency range
50045.7Stable and consistent
63045.2Maintains performance
80043.9Minor dip, still within high isolation range
100042.0Slight drop, but still good isolation
125044.9Rebounding TL values
160046.0Peak TL, excellent mid-to-high frequency blocking
200046.5Strong performance continues
250046.5Consistent with mid-high isolation pattern
315043.3Slight dip, but minimal effect on STC
400049.1Excellent high-frequency blocking
500052.7Exceptional performance; useful for mechanical noise blocking


Performance Interpretation

  • Low Frequencies (100–250 Hz): The door performs adequately, with TL values between 35.7–42.6 dB. These frequencies are hardest to block due to longer wavelengths, and most doors show lower TL here.
  • Speech Frequencies (250–2000 Hz): This is the most critical range for human speech. Homein’s STC 45 door shows strong performance (42–46.5 dB), making it highly effective for offices, studios, or conference rooms.
  • High Frequencies (2000–5000 Hz): The TL values rise dramatically (up to 52.7 dB), indicating excellent attenuation of high-frequency noise such as alarms, whistles, or HVAC equipment.


This STC 45 rating means Homein doors are ideal for environments where confidentiality or quietness is essential.



Homein STC 45 Acoustic Steel Door Material and Construction

Homein’s acoustic door construction includes:

  • Steel face sheets: Galvanized or stainless steel skins for strength
  • Sound-insulating core: Multi-layer acoustic materials including Ultra fine fiber glass wool, sound boards, and damping layers
  • Sealed frame system: Acoustic seals around the door perimeter
  • Precision machining and ingenious structural design ensure that all door components fit tightly together, creating a seamless closure with no gaps, effectively reducing sound transmission.
  • The multilayer laminated glass blocks sound transmission, while the broken-bridge glass frame reduces sound vibration transmission through the frame structure.

acoustic steel door test report

This multi-layer design is optimized to absorb and block a wide range of sound frequencies.


Door material 0.8~1.2mm Galvanized steel
Frame material 1.2~1.8mm Galvanized steel
Door core Honeycomb; PU; mineral core; acoustic wool
Finish Poweder coating
Leaf thick Std:45mm (customizable)
Width Std:3ft (customizable Max: 1250mm single leaf)
Height Std:7ft (customizable Max: 4000mm)
Hardware Lock; Hinge; Closer
STC Max STC56
Fire rate Max 120min
door handing Right hand interior
Right hand interior

Stand at outside; hinge at right hand; lock at left hand, door swing to inside

door handing Left hand interior
Left hand interior

Stand at outside; hinge at left hand; lock at right hand, door swing to inside

door handing Right hand outside
Right hand outside

Stand at outside; hinge at right hand; lock at left hand, door swing to outside

door handing Left hand outside
Left hand outside

Stand at outside; hinge at left hand; lock at right hand, door swing to outside

Door Slabs Construction (Optional)

door with Hollow core steel door
Hollow core steel door

45mm or 50mm Thk; 0.8 or 1.0 galvanized steel panel; Honeycomb paper core

door with Aluminum Hollow steel door
Aluminum Hollow steel door

45mm or 50mm Thk; 0.8 or 1.0 galvanized steel panel; Aluminum Honeycomb paper core

door with Fireproof mineral core steel door
Fireproof mineral core steel door

45mm or 50mm Thk; 0.8 or 1.0 galvanized steel panel; Fireproof mineral core; smoke seal all round

door with Acoustic core steel door
Acoustic core steel door

60mm or 70mm Thk; 0.8 or 1.0 galvanized steel panel; Acoustic core; acoustic seal all round

Door Frame Type (Optional)

Welded door frame
Welded door frame

1.2-1.8mm Galvanized steel frame; welded frame;fire rate up to 3 hours

Knock-down door frame A
Knock-down door frame A

1.2-1.8mm Galvanized steel frame; Knock-down frame; fire rate up to 3 hours

Knock-down door frame B
Knock-down door frame B

1.2-1.8mm Galvanized steel frame; Knock-down frame;fire rate up to 3 hours

Double rebate door frame
Double rebate door frame

1.2-1.8mm Galvanized steel frame; welded frame;fire rate up to 3 hours

Double egress door frame
Double egress door frame

1.2-1.8mm Galvanized steel frame; welded frame; use for acoustic door, stc grade up to stc56

Standard Door Hardware

Standard Mortise Lock
Standard Mortise Lock

SUS304 handle; SUS304 forend; SUS latch & deadbolt; brass cylinder & key; SUS304 screw; Fire rate up to 3hours

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Standard Lock for USA
Standard Lock for USA

SUS304 handle; SUS304 forend; SUS latch & deadbolt; brass cylinder & key; SUS304 screw; Fire rate up to 2hours

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Hydraulic closer
Hydraulic closer

Aluminum alloy; adjustable speed; Fire rate up to 1.5hours

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Butt Hinge
Butt Hinge

SUS304 stainless steel; Size in 4''*4''*3mm or 4''*3''*3mm; 2BB; SUS304 screw; ; Fire rate up to 3hours

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Acoustic seal
Acoustic seal

12*12mm acoustic seal; STC 33Db; Durable rubber; self-stick;

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Popular Solid color

RAL 1023 Traffic Yellow
RAL 3020 Traffic Red
RAL 3003 Ruby Red
RAL 3000 Flame Red
RAL 1015 Light Ivory
RAL 2009 Traffic Orange
RAL 5002 Ultramarine Blue
RAL 5003 Sapphire Blue
RAL 5005 Signal Blue
RAL 5011 Steel Blue
RAL 5013 Cobalt Blue
RAL 5015 Sky Blue
RAL 5017 Traffic Blue
RAL 6002 Leaf Green
RAL 6005 Moss Green
RAL 6009 Fir Green
RAL 6001 Emerald Green
RAL 6003 Olive Green
RAL 6028 Pine Green
RAL 7012 Basalt Grey
RAL 7000 Squirrel Grey
RAL 7021 Black Grey
RAL 7022 Umbra Grey
RAL 7024 Graphite Grey
RAL 7030 Stone Grey
RAL 7037 Dusty Grey
RAL 8019 Grey Brown
RAL 8017 Chocolate Brown
RAL 9011 Graphite Black
RAL 9006 White Aluminium
RAL 9010 Pure White
RAL 9016 Traffic White

Read More Color >>>

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