Classroom acoustics: a specification checklist for schools and colleges

Children and students spend hours every day listening to teachers. In a noisy or echoey classroom, they miss words, lose focus and tire quickly. Teachers strain their voices. Good classroom acoustics can make a real difference to learning, and much of the work can be done during a term break.

Our team has worked in acoustics since 2021, with 50 projects for 49 organisations across Pakistan, from government departments and universities to broadcasters. See our educational acoustics service.

Signs your classrooms have an acoustic problem

• Teachers report sore throats or tired voices by the end of the day.
• Students at the back often ask for things to be repeated.
• You can hear the next class through the wall or the false ceiling.
• Noise from fans, AC units or the road makes teachers raise their voices.
• The room sounds “boomy” or echoey when it is empty.

If two or more of these are true, a short survey is worthwhile. In cities such as Lahore, Karachi and Islamabad, traffic and generator noise are common sources, while in hot months the AC and fans are often the main issue.

Set measurable targets

Two numbers matter most:

• Reverberation time (RT60): how long sound lingers. Measure it to ISO 3382-2.
• Background noise: noise from fans, AC, corridors and traffic, in dB(A).

International guidance sets limits for both. For example, the American standard ANSI/ASA S12.60 and BB93, the guide used for schools in England, give classroom targets for reverberation time and background noise. Treat them as reference points only. Neither is a Pakistani requirement. Ask your acoustic designer to choose suitable targets for your rooms and write them into the specification.

Checklist: echo control

• Absorptive ceiling across most of the classroom (state the NRC or αw value)
• Absorptive panels on the back wall, opposite the teacher
• Pin-up boards in absorptive material where possible
• Avoid large areas of bare tiles, glass and plaster
• Fire performance certificates for every material

Checklist: background noise

• Ceiling fans that run quietly at normal speed
• Split AC units placed away from the teaching wall, and serviced
• Generator and UPS rooms away from classrooms, or enclosed
• Windows facing busy roads upgraded or sealed
• Noisy corridors and playgrounds separated by closed doors

Checklist: separation between rooms

• Partitions built up to the slab, not stopping at the false ceiling
• Sealed doors with seals and drop-down sweeps
• Gaps around pipes, ducts and cable trays sealed
• Music rooms and halls kept away from quiet classrooms

Use lab sound insulation ratings (STC to ASTM E413 or Rw to ISO 717-1) to specify walls and doors. To check the built result on site, measure to ISO 16283-1 and rate it as DnT,w under ISO 717-1.

Checklist: floors and furniture

• Rubber feet or glides on chairs and desks to stop scraping
• Carpet tiles or resilient flooring in suitable rooms
• Soft furnishings in reading corners

Checklist: voice support

• Large classrooms and lecture rooms may need a small voice-lift system
• Wireless microphone for teachers with soft voices or long sessions
• Even speaker coverage, not one loud speaker at the front

Checklist: testing and handover

• Measure reverberation time before and after treatment
• Measure background noise with fans and AC running
• Record results in a short handover report
• Hand over care and cleaning instructions for panels

Special rooms

Science labs, computer labs, libraries, music rooms and sports halls each need their own approach. Madrassa and hifz classes, where recitation must be heard clearly, also benefit from echo control. For lecture theatres, see our guide to lecture hall acoustics.

Phasing within a budget

Schools rarely treat every room at once. A sensible order is:

1. Rooms with the most complaints or the most students
2. Early years and language classes, where clear speech matters most
3. Halls and multi-purpose rooms
4. Remaining classrooms in later breaks

Public schools and tenders

Government and public schools follow PPRA or provincial procurement rules. Keep the specification brand-neutral with measurable values. Our tender specifications page has sample clauses.

Prefer a printable version? Download the acoustic room checklist.

Related reading

• Lecture hall acoustics: a specification guide for universities
• How to write an acoustic tender specification

Frequently asked questions

Why do classroom acoustics matter?

In an echoey or noisy room, students miss words and lose focus, and teachers strain their voices. Controlling echo and noise makes speech clearer for everyone, especially young children and language learners.

What standards apply to classroom acoustics?

There is no single Pakistani standard. Designers often refer to ANSI/ASA S12.60 (USA) and BB93 (England) for classroom reverberation time and background noise, and measure to ISO 3382-2.

What is the quickest improvement for a noisy classroom?

Usually an absorptive ceiling and back-wall panels, plus quieter fans and serviced AC units. A survey shows which change gives the biggest gain in each room.

Can classrooms be treated during term time?

Most work can be done during weekends and term breaks. A survey helps plan phases around the school calendar.

How do we start?

Call or WhatsApp +92 300 8467101 for a free phone consultation. For an accurate design and BOQ, book a paid site survey.