표준소음재생시스템 구매

계약

요약 AI 요약

모바일 단말기, 무선 오디오 기기, 차량용 핸즈프리 시스템의 음향 측정 및 분석을 위한 표준소음재생시스템을 구축하는 사업입니다.

• 국제 표준(IEC, ITU-T, 3GPP 등)을 준수하는 전기 음향 측정 및 모바일 표준 적합성 테스트 기능
• POLQA 알고리즘 기반의 음성 품질 평가 및 소음 억제 성능 평가 기능
• 8채널 스피커와 마이크 배열을 이용한 배경 소음 시뮬레이션 및 15분 이내 자동 보정 기능
• 블루투스 5.4 이상 버전(LE Audio, Auracast 등) 및 최신 오디오 코덱 지원 테스트 기능
• 인체 모사 장치(HATS: 머리 및 상체 시뮬레이터) 및 인공 입/귀 시뮬레이터 제공
• 실시간 분석기(FPGA 기반), 저소음 전력 증폭기, 서브우퍼 및 관련 액세서리 일체 납품

AI에게 이 공고를 물어볼 때 · ChatGPT · Claude에 이 링크를 함께 주면 공고문과 첨부를 정리한 글을 읽고 답합니다. /ai/projects/R26BK01676406 · 베타 기간 무료

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실적경쟁 · PQ

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국제입찰

국제입찰

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USD 432,833.93 (배정예산의 통화)

예정가격 방식

비예가

납품

품명

음향분석기 (4111550302)

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1 SET

인도조건

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공고 정보

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재공고 (재입찰공고)

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08/11(화)

공고번호

R26BK01676406-000

참조번호

R26DC00225351

공고기관

조달청

수요기관

한국소비자원

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규격적합자중 최저가

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-

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-

사전규격번호

R26BD00250665

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재공고

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첨부파일

• HWPX · 구매규격서.hwpx · 공고규격서
• HWPX · 공급자증명서 양식 및 작성요령.hwpX · 공고규격서
• HWPX · 해외공급자 계약서 서명권한 위임장(양식).hwpX · 공고규격서
• HTM · R26BK01676406-000_20260811132356_외자공고서_D02.htm · 공고규격서
• HTM · R26BK01676406-000_20260811132356_SUMMARY_OF_BIDDING_D03.htm · 공고규격서

첨부 내용을 정리한 글 — 자격 · 배점 · 일정 · 발췌 ›

문서 발췌

Ⅰ. End-User's Use The system shall be capable of being installed and operated within the End-User's Anechoic Chamber (Dimensions: 10m(W)x7m(D)x5m(H)). If the system cannot perform the specified tests within this specific facility, it shall not be considered compliant with the requirements of this specification. The system described herein is intended to be used for the acoustical measurement and analysis of mobile terminals, wireless audio devices, and automotive hands-free systems. The system shall perform the following specific functions and tests in accordance with the relevant international standards: 1. General Electro-Acoustic Measurement: The system shall be capable of measuring fundamental electro-acoustic parameters including Frequency Response (FR), Total Harmonic Distortion (THD), THD+N, Rub & Buzz analysis, and playback time analysis under fully charged battery conditions. These measurements shall be performed in accordance with IEC 60268-5(Sound system equipment — Part 5: Loudspeakers), IEC 60268-7(Sound system equipment — Part 7: Headphones and earphones), and KS C 5500(좌우 독립형 무선 이어폰의 오디오 재생 시간 측정방법 (Audio playback time measurement method for true-wireless earphones)). The measurement microphones, artificial ears, ear simulators, and Head and Torso Simulator (HATS) used for these measurements shall comply with the specifications and dimensions defined in IEC 61094(Electroacoustics — Measurement microphones), IEC 60318-4(Electroacoustics — Simulators of human head and ear — Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by means of ear inserts), IEC 60318-7 (Electroacoustics — Simulators of human head and ear — Part 7: Head and torso simulator for the measurement of hearing aids), and ITU-T P.58(Head and torso simulator for telephonometry).

2. Standard Compliance Testing for Mobile: The system shall be capable of performing automated acoustic performance tests in full compliance with 3GPP TS 26.131(Terminal acoustic characteristics for telephony; Requirements) and 3GPP TS 26.132(Speech and video telephony terminal acoustic test specification) standards. 3. Voice Quality Evaluation: The system shall be capable of evaluating speech quality using the POLQA algorithm in accordance with ITU-T P.863(Perceptual objective listening quality prediction (POLQA)). 4. Background Noise Simulation Environment: The system shall provide a background noise simulation environment fully conforming to ETSI TS 103 224 (Speech and multimedia Transmission Quality (STQ); A sound field reproduction method for terminal testing including a background noise database) and ETSI ES 202 396-1 (Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database). This system shall include an 8-channel loudspeaker arrangement and a microphone array (MSA). Prior to each measurement session, the system shall automatically equalize the reproduced sound field using the MSA such that the tolerances specified in ETSI TS 103 224 are satisfied. The automatic equalization process shall be completed within 15 minutes per session. Manual-only equalization, or automatic equalization requiring more than 15 minutes, shall not be considered compliant.

5. Advanced Noise Suppression Evaluation: The system shall be capable of evaluating noise suppression performance (N-MOS, S-MOS, G-MOS) in accordance with ETSI TS 103 106(Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise: Background noise transmission for mobile terminals — objective test methods) and ETSI TS 103 281(Speech and multimedia Transmission Quality (STQ); Speech quality in the presence of background noise: Objective test methods for super-wideband and fullband handheld terminals), utilizing the background noise environment defined in Item 4 above. 6. Next-Gen Bluetooth Testing: The system shall be capable of conducting acoustic measurements of Bluetooth® audio devices (DUTs) over Bluetooth® Core Specification v5.4 (or higher), including LE Audio, Isochronous Channels (ISOC), and Public Broadcast Profile (PBP/Auracast™). The system shall be capable of transmitting test signals encoded with all audio codecs defined in the Bluetooth® v5.4 (or higher) specification. The system shall support both mandatory and optional codecs defined in the Bluetooth® v5.4 (or higher) specification. Partial support of the codecs defined in the Bluetooth® v5.4 (or higher) specification, or support of these codecs only under legacy Bluetooth® versions, shall not be considered compliant.

7. System Completeness and Supplier Responsibility: The Supplier shall consider all components, work, and services necessary for the complete installation, integration, and operation of the system at the End-User's site in advance, and shall include all such items in the quotation. Any additional items, work, or services not included in the quotation but subsequently required to implement the specified functions of the system shall not be subject to additional charges to the End-User. 8. Any failure to meet the requirements specified in this "End-User's Use" section shall not be considered compliant with this specification. Ⅱ. Configuration of Goods Ⅲ. Performance and Specifications 1. Mainbody 1-1. Background Noise Simulation System

※ System Self-Noise Requirement: When the entire background noise simulation system (Amplifiers active, Speakers connected) is in idle mode within the End-User's anechoic chamber, the measured background noise level at the reference point shall not exceed 30 dBSPL(A). 1-1-1. 8-Channel Microphone Array for Automatic Equalization (1) Type: Pre-polarized condenser microphone array with low-diffraction open structure. (2) Structure Design: The array fixture shall be constructed of thin, acoustically transparent rods (diameter < 10 mm) to minimize acoustic reflections. Bulky frames are strictly prohibited. (3) Dimensions: • Max. Diameter < 250 mm (To simulate a point source at HATS position) • Max. Height < 250 mm (4) Weight: < 1.0 kg (excluding cable) to ensure stability and minimize stand load. (5) Microphone Configuration: 8 microphones arranged in the specific geometry required by ETSI TS 103 224 (Supports both symmetric and asymmetric configurations). (6) Frequency Range: 20 Hz to 20 kHz. (7) Sensitivity: 50 mV/Pa (± 2 dB) @ 1 kHz. Sensitivity data shall be transmitted via TEDS (IEEE 1451.4). (8) Dynamic Range: > 128 dB(A) (9) Self-Noise: < 16 dBSPL(A) (10) Functionality (Crucial): The system shall perform automatic iterative measurements and filter adjustments through the controller to ensure the equalization error is minimized within the specified tolerance (± 3 dB) in real-time. The automatic equalization process shall be completed within 15 minutes per session. Manual-only equalization, or automatic equalization requiring more than 15 minutes, shall not be considered compliant.

1-1-2. High-Fidelity Loudspeakers (Qty: 8) (1) Type: 2-way Compact Passive Loudspeaker, Bass Reflex type with rear port. (2) Frequency Response: 55 Hz to 22,000 Hz (+/- 3 dB), covering super-wideband and fullband requirements (3) Power Handling: • Rated Power 120 W • Max Power 170 W (Long/Short term) (4) Sensitivity: 85 dB (1W/1m) (5) Impedance: 4 Ohm (6) Physical Dimensions: 174 x 285 x 250 mm (W x H x D) (Tolerance ± 10 mm) (7) Weight: 5.0 ~ 6.0 kg per unit (8) Acoustic Characteristics: Linear frequency response suitable for precision acoustic measurement (Not PA/Stage speakers). 1-1-3. Subwoofer System (1) Type: High-performance subwoofer matched with the main system. (2) Frequency Response: 28 Hz to 150 Hz (-3 dB), suitable for low-frequency extension below the main loudspeaker range (3) Power Handling: > 200 W (RMS) (4) Phase Control: Adjustable (0° to 180°) (5) Dimensions: Approx. 350 x 450 x 370 mm (W x H x D) (6) Weight: 15 ± 0.5 kg 1-1-4. Low-Noise Power Amplifiers (1) Type: Class D 2-Channel Power Amplifier (Qty: 4 units for 8 channels) (2) Output Power: • 350 W per channel (@ 4 Ohm) • 200 W per channel (@ 8 Ohm) (3) Frequency Response: 20 Hz to 20 kHz (4) Signal-to-Noise Ratio (S/N) > 110 dB (Unweighted) > 113 dB (A-weighted) (5) THD+N: < 0.1 % (6) Crosstalk: > 90 dB (7) Damping Factor: > 500

(8) Cooling: Fan-less (Convection) or Ultra-silent fan (< 25 dBA) operation. (9) Rack Size: 19-inch standard rack mountable. 1-2. Main Measurement Hardware Platform 1-2-1. Real-time Analyzer (1) Architecture: Modular hardware platform with FPGA-based real-time signal processing (No PC-dependent processing allowed) (2) Sampling Rate: 44.1, 48, 96, up to 192 kHz (3) Resolution: 24-bit ADC/DAC (4) Input Dynamic Range: > 115 dB(A) (5) THD+N (Analog I/O): < -100 dB (6) Cross-talk: < -110 dB (7) PC Interface: USB 3.0 (SuperSpeed) or Gigabit Ethernet (1 Gbit/s). 1-2-2. Bluetooth® Interface Module (1) Hardware Requirement: Built-in hardware radio module supporting Bluetooth® v5.4 (or higher) (2) ISOC: Shall support Isochronous Channels for LE Audio testing (3) Auracast™: Shall support Public Broadcast Profile (PBP) and Auracast™ features for broadcast audio simulation. (4) Supported Codecs: Shall support all audio codecs defined in the Bluetooth® v5.4 (or higher) specification, including but not limited to LC3, SBC, AAC, aptX, mSBC, and CVSD. (5) Latency Analysis: Hardware-level latency measurement accuracy < 1 ms 1-3. Measurement & Analysis System 1-3-1. Measurement system (1) Fully compliant with: • 3GPP TS 26.131/132 - All bandwidth modes: Narrowband(NB), Wideband(WB), Super-wideband(SWB), and Fullband(FB) - All device categories: Handset, Headset, Hands-free, and Wearable terminals

- Sending and receiving direction measurements - Loudness ratings: SLR, RLR, STMR, LSTR - Echo performance: TELR, TCLW - Frequency response, distortion, idle channel noise, and delay • ITU-T P.863 (POLQA v3) - MOS-LQO output - Narrowband(NB), Super-wideband(SWB), and Fullband(FB) operating modes - Both sending and receiving direction analysis • ETSI TS 103 106/281 (3QUEST) - N-MOS, S-MOS, and G-MOS output - Both sending (uplink) and receiving (downlink) direction analysis - All bandwidth modes: NB, WB, SWB, and FB - Compatibility with the background noise database defined in ETSI ES 202 396-1 • ETSI TS 103 224 - 8-channel sound field reproduction control - Microphone array (MSA) based automatic equalization to satisfy the tolerances specified in the standard - Automatic equalization completion within 15 minutes per session - Integration with the background noise database defined in ETSI ES 202 396-1 1-3-2. Auto-Calibration (Feedback Loop) (1) The system shall feature an automated iterative feedback loop. It shall: • Measure the sound field using the 8-channel array • Calculate the inverse filters • Apply them • Re-measure to verify compliance against the standard tolerance mask automatically. (2) The entire auto-calibration process, from initial measurement to final verification, shall be completed within 15 minutes per session. Manual-only calibration, or automatic calibration requiring more than 15 minutes, shall not be considered compliant.

1-3-3. Analysis Functions (1) Supported functions: • FFT(Fast Fourier Transform based spectral analysis) • Level vs Time(time-domain amplitude analysis) • 3D Spectrogram(time-frequency-amplitude visualization) • Relative Approach • Speech-based Distortion (ETSI TS 104 063) - Nonlinearity measure method compliant with ETSI TS 104 063 clauses 5 and 6 - Test signals in accordance with ITU-T P.501 (speech signals) - Active speech level normalization in accordance with ITU-T P.56 - Spectral analysis based on Welch's method - Method components: preprocessing, activity detection, impulse response estimation, linear signal component estimation, spectral noise component estimation, spectral analysis, and aggregated non-linearity measure - Both sending and receiving direction analysis - Output: distortion energy versus frequency (spectral) and aggregated overall measure. - Implementation shall be verifiable against the reference code specified in Annex A of ETSI TS 104 063. 1-4. Head and Torso Simulator (HATS) 1-4-1. Head and Torso (1) Standard Compliance: The HATS shall comply with ITU-T P.58, IEC 60318-7, and the geometric requirements of ANSI S3.36. (2) Physical Dimensions: • Head breadth: 152 mm (147–154 mm, in accordance with ITU-T P.58 Table 1) • Head length: 191 mm (190–205 mm, in accordance with ITU-T P.58 Table 1)

• EEP to vertex: 130 mm (128–136 mm, in accordance with ITU-T P.58 Table 1) • EEP to EEP distance: 132 mm (130–133 mm, in accordance with ITU-T P.58 Table 1) • EEP to occipital wall: 94 mm (92–100 mm, in accordance with ITU-T P.58 Table 1) • EEP to shoulder: 170 mm (167–181 mm, in accordance with ITU-T P.58 Table 1) • EEP to centre lips: 130 mm (128–131 mm, in accordance with ITU-T P.58 Table 1) • Chin-to-vertex length: 224 mm (216–225 mm, in accordance with ITU-T P.58 Table 1) • Mouth-ear plane angle: 24° (21.5°–25.5°, in accordance with ITU-T P.58 Table 1) • Shoulder breadth: 420 mm (400–455 mm, in accordance with ITU-T P.58 Table 1) • Chest depth: 235 mm (178–272 mm, in accordance with ITU-T P.58 Table 1) • Shoulder depth: 110 mm (108–161 mm, in accordance with ITU-T P.58 Table 1) • HATS height: approximately 600 mm (in accordance with ITU-T P.58 Table 1) (3) Head Cross-Section Templates: The head cross-sections (excluding pinnae) shall conform to the templates specified in Figures 4, 5, 6, and 7 of ITU-T P.58. (4) Skin Material: soft silicone or equivalent human tissue-simulating material, in accordance with ITU-T P.58 clause 9.7. (5) Mounting: shall support both tripod-mounted and torso-mounted configurations. 1-4-2. Artificial Mouth (1) Type: 2-way loudspeaker system for wideband reproduction

(2) Frequency Range: 100 Hz to 8 kHz (fully specified per ITU-T P.58 Table 7), extendable to super-wideband range per ITU-T P.58 scope (3) Mouth Reference Point (MRP): 25 mm in front of the lip plane (in accordance with ITU-T P.58 clause 3.2.15) (4) Lip Ring: 25 mm diameter, less than 2 mm thick, non-magnetic material (in accordance with ITU-T P.58 clause 3.2.13) (5) Normalized Free-field Response: shall comply with the response values and tolerances specified in ITU-T P.58 Table 7 (near-field and far-field measurement points) (6) Directivity: shall comply with the far-field measurement points and tolerances specified in ITU-T P.58 Table 6 (7) All SPL specifications shall be referenced to the Mouth Reference Point (MRP) 1-4-3. Artificial Ears(pinna) and simulator

※ Common Requirements (applicable to all SETs): • All pinna and ear simulator configurations shall be supplied as matched pairs for both left and right ears. Monaural configurations are not acceptable. • Pinna dimensions and positioning on the HATS shall comply with ITU-T P.58 clause 7.3 and the corresponding pinna type definitions in ITU-T P.57. • The HATS free-field frequency response (sound pick-up) shall comply with ITU-T P.58 Table 2 (100 Hz to 20 kHz), with tolerances specified therein. • The HATS diffuse-field frequency response shall comply with ITU-T P.58 Table 3. • The HATS monaural frequency response shall comply with ITU-T P.58 Table 4. • Sound leakage: with the ear canal sealed, free-field response shall be at least 35 dB below the response with the ear canal open (in accordance with ITU-T P.58 clause 8.1.5). • All SPL specifications shall be referenced to the Ear-Drum Reference Point (DRP). • Ear Reference Point (ERP) location shall comply with ITU-T P.58. • Each ear simulator shall be supplied with an individual calibration certificate traceable to national or international standards. • Each microphone shall support TEDS (Transducer Electronic Data Sheet) per IEEE 1451.4. • The pinnae and ear simulators shall be of modular design, allowing interchange among the three SETs on the same head and torso assembly without modification to the head/torso unit.

(1) SET A - Simulator: shall comply with ITU-T P.57 Type 3.3, with acoustic transfer impedance in accordance with IEC 60318-4 - Pinna: shall comply with ITU-T P.57 Type 3.3 (2) SET B(for Low noise, Type 3.3) -  Simulator Frequency Response: Shall be measured at the DRP, conforming to the response curve specified in the figure below, within the following tolerances over the operating frequency range: 20 Hz to 5 kHz: ± 1 dB 5 kHz to 10 kHz: ± 2 dB 10 kHz to 20 kHz: ± 3 dB - Simulator Frequency Range: 3 Hz ~ 20000 Hz - Simulator Lower limit SPL: ≤ 16 dBSPL(A) - Simulator Upper limit SPL: ≥ 148 dBSPL(A) - Simulator Sensitivity: 50 mV/Pa ± 2 dB @ 1kHz - Pinna: shall comply with ITU-T P.57 Type 3.3 (3) SET C(for Low noise + HEC, Type 4.4) - Simulator: shall comply with ITU-T P.57 Type 4.4 - Pinna: shall comply with ITU-T P.57 Type 4.4 - Shall satisfy the low-noise artificial ear requirements specified in Chapter 7 of ITU-T P.57 - Pinna shall incorporate an anatomically shaped concha and ear canal (human-like ear canal)

2. Accessories 2-1. Speaker Stands (Qty: 8) (1) Type: Heavy-duty tripod or base stand optimized for studio monitors (2) Height Adjustment: Adjustable range shall cover 1,100 mm to 1,700 mm to align with HATS ear height (3) Load Capacity: > 35 kg (Safety factor > 5 for vibration control) (4) Base Diameter: > 650 mm for stability (5) Weight: > 10 kg per stand 2-2. Microphone Array Stand (Qty: 1) (1) Type: Dedicated stand base compatible with the 8-channel microphone array (2) Stability: Heavy round base to minimize footprint reflections (3) Height Adjustable range: 1.1 ~ 1.3 m (Nominal 1.2m) 2-3. System Cabling (1 Set) (1) General Requirement: The supplier shall provide all necessary cables for equipment configuration and connection, considering the specific conditions of the End-User's test room and Anechoic Chamber. (2) Speaker Cables: High-quality Oxygen-Free Copper (OFC) cables. (3) Length: 50 meters per channel (Total 8 channels) (4) Conductor: 4 x 2.5 mm² or 2 x 4.0 mm² cross-section to minimize signal loss (5) Connectors: High-reliability Speakon to Banana/Wire (6) Signal Cables: Fully shielded XLR cables for amplifiers and LEMO cables for HATS. 2-4. Rack Mounting Kits (1) Spec: 19-inch standard Rack Mount brackets (1RU / 2RU sizes) compatible with the provided Main Hardware and Amplifiers. Ⅳ. Remarks