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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

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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
100	35.7	Lower TL at low frequency; typical for doors
125	40.5	Improved TL at low-bass range
160	39.0	Slight dip, but still good
200	39.7	Stable response in low-mid range
250	42.6	Strong performance starting here
315	44.4	Increasing TL, effective in mid-range
400	45.8	High TL in speech frequency range
500	45.7	Stable and consistent
630	45.2	Maintains performance
800	43.9	Minor dip, still within high isolation range
1000	42.0	Slight drop, but still good isolation
1250	44.9	Rebounding TL values
1600	46.0	Peak TL, excellent mid-to-high frequency blocking
2000	46.5	Strong performance continues
2500	46.5	Consistent with mid-high isolation pattern
3150	43.3	Slight dip, but minimal effect on STC
4000	49.1	Excellent high-frequency blocking
5000	52.7	Exceptional 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