Name

Longman Lindsey

Legal name

Longman Lindsey

Website

https://longmanlindsey.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Acoustical Consulting Services

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

Keywords

• Acoustical consulting services
• Architectural acoustics design
• Environmental noise control
• Sound masking systems
• Acoustical modeling and testing

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Professional Consulting Services: Fee-for-service consulting engagements for acoustical design, analysis, testing, and verification services to the construction industry.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Longman Lindsey provides professional acoustical consulting services for the construction industry, advising on architectural and room acoustics, environmental noise control, sound masking system design, acoustical modeling, troubleshooting of existing noise problems, and product verification testing. Engagements are delivered by a partner-led team with over 100 years of combined experience, typically as fee-for-service assignments for architects, developers, building owners, property managers, and contractors.

Product overview

Longman Lindsey is a full-service acoustical consultancy firm and one of the largest independent acoustical consulting groups in the United States. The company provides a comprehensive suite of consulting services for the construction industry, including Architectural Acoustics Services, Room Acoustics Services, Acoustical Modeling, Sound Masking Systems Design, Environmental Noise Control, Acoustical Troubleshooting, and Product Verification and Testing. Rather than a software platform, the offering consists of professional engineering consulting services delivered by a team with over 100 years of combined experience, where each service addresses different aspects of sound and vibration control in built environments.

Differentiator

Problem solved

Functional benefit

Products and services

• Architectural Acoustics Services
• Room Acoustics Services
• Acoustical Modeling
• Sound Masking Systems Design
• Environmental Noise Control
• Acoustical Troubleshooting
• Product Verification and Testing

Named customers14 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• A Trinity Consultants CompanycoreOthersLongman Lindsey is identified as 'A Trinity Consultants Company' indicating a parent-subsidiary relationship or affiliation with Trinity Consultants, an environmental consulting firm.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Arup: Global engineering consultancy with a substantial acoustics, sound, and vibration practice serving buildings, transport, and urban projects—large incumbent with overlapping but not specialized offerings.
• STV Group: Engineering, architectural, and construction management firm with acoustics and vibration capabilities serving buildings and infrastructure—broader incumbent offering acoustic services as part of a larger portfolio.
• Buro Happold: Global multi-disciplinary engineering consultancy with an established acoustics practice serving commercial, cultural, and infrastructure projects—competes broadly but is not a dedicated acoustics specialist.

Direct peers

• Threshold Acoustics: Independent acoustical consulting firm providing architectural acoustics, environmental noise, and sound system design for performing arts, civic, and commercial projects—comparable boutique peer.
• Cavanaugh Tocci Associates: Independent acoustical consulting and audio-video systems design firm serving construction clients with services in architectural acoustics, sound isolation, and noise control—directly comparable specialty consultancy.
• Jaffe Holden: Acoustics, audio-visual, and theatre planning consultancy serving cultural, educational, healthcare, and corporate clients—directly comparable service mix and customer types.
• Walters-Storyk Design Group (WSDG): Acoustical consulting and architecture firm specializing in recording studios, broadcast, and commercial spaces—comparable acoustics consultancy with specialty applications.
• Acentech: Independent acoustical consulting firm providing architectural acoustics, environmental noise, and AV design for buildings—directly comparable to Longman Lindsey's service portfolio and clientele.
• Kirkegaard Associates: Independent acoustical consulting firm offering room acoustics, sound isolation, environmental noise, and vibration design for performance, civic, and commercial buildings—comparable scale and specialty.
• Cerami & Associates: Acoustical and vibration consulting firm serving building, infrastructure, and transportation projects—overlapping service portfolio and similar specialty focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/longman-lindsey

Revenue estimate

Valuation estimate

Number of profiles

Profiles19 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Longman Lindsey