Bedrock · Bedrock SMxx · Handheld sound level meter
Bedrock SM90
CurrentClass 1 sound level meter with STIPA and Full STI speech intelligibility measurement on the SMxx hardware platform. Includes real-time octave analysis, FFT, reverberation time, building acoustics and long-term LAeq logging, and is aimed at commissioning and verification of public address and voice alarm systems.
Specifications verified on .
- Type
- Handheld sound level meter
- Class
- Class 1
- Octave bands
- 1/1 and 1/3
- Connectivity
- USB
- Weight
- 530 g
- Battery life
- 4 h
Specifications
As published by Bedrock. Fields the manufacturer does not publish are omitted rather than estimated.
| Specification | Value |
|---|---|
| IEC 61672-1 class | Class 1 |
| Standards | IEC 61672-1:2014 group X class 1, ANSI S1.4 type 1, IEC 60268-16 rev. 4 (2011) and rev. 5 (2020), IEC 61260:2014, ISO 3382-2, ANSI S12.2, ISO 1996 |
| Specification | Value |
|---|---|
| Measurement range | 30 to 122 dB with the included microphone; electronics > 110 dB combined ranges |
| Linearity range | 26 to 118 dB (low range); 42 to 124 dB (high range), Z-weighted |
| Peak range | up to 124 dB (highest range, 20 Hz to 20 kHz) |
| Frequency range | 20 Hz to 20 kHz |
| Frequency weightings | A, C, Z |
| Time weightings | F, S, I |
| Parameters | Leq, SEL, Lmax, Lpeak, L10, L90 and other percentiles, STI, RT60, Dn, R', DnT, L'nT |
| Specification | Value |
|---|---|
| Octave bands | 1/1 and 1/3 |
| Octave band filter class | exceeds class 1 (IEC 61260:2014); 1/6 and 1/12 octave also available |
| FFT | FFT analyser (line count not published) |
| Reverberation time | Yes |
| Building acoustics | Yes |
| Speech intelligibility | STIPA and Full STI |
| Audio recording | Yes |
| Specification | Value |
|---|---|
| Memory | 8 GB internal |
| Specification | Value |
|---|---|
| Microphone | BAMT1-MP201 1/2" free-field, class 1, XLR 48 V phantom, 50 mV/Pa |
| Detachable preamplifier | Yes |
| Display | 3.2" resistive colour touch LCD, 320 x 240 |
| Battery | NiMH pack, 4.8 V, 2500 mAh |
| Battery life | 4 h |
| Weight | 530 g |
| Dimensions (mm) | 210 x 85 x 55 (excluding microphone) |
| Operating temperature (°C) | 5 to 35 |
| Specification | Value |
|---|---|
| Connectivity | USB |
| Remote control | remote-control API over USB |
| Software | Bedrock Elite Analyzer, Bedrock Studio |
Where this data comes from
| Kind | Document | Accessed |
|---|---|---|
| Product page | Bedrock SM90 Class 1 Sound Level Meter | |
| Datasheet | Bedrock SM90 datasheet, July 2026 | |
| Manual | SMxx user manual v3.6.4 |
Verified on . Only the manufacturer’s own published material is used; distributor pages are not sources.
Spec out of date? Tell us (reference bedrock-sm90).
Verified owner reviews
Reviews from people who own and use this instrument, each checked against a serial number by a person.
Opens in November 2026. Own this instrument? Register your interest.
Known issues and firmware notes
Hardware and firmware problems reported by owners, with the firmware version concerned and any manufacturer response.
Opens in November 2026. Own this instrument? Register your interest.
Feature requests
Functions owners would like to see in a firmware update or a successor model.
Opens in November 2026. Own this instrument? Register your interest.
Read next
- How to choose a sound level meter · Class 1 vs class 2, integrating vs non-integrating, parameters by application, options and licences, calibration.
- Class 1 vs class 2 sound level meters · IEC 61672-1 tolerances, what the classes do and do not say, and where each is typically required.
Related instruments
More from Bedrock
- Bedrock AM100 · Bedrock · Class 1
- Bedrock Elite i5 · Bedrock · Class 2
- Bedrock Elite i9 · Bedrock · Class 1
- Bedrock Elite i10 · Bedrock · Class 1
Other class 1 handheld sound level meters
- SoundAdvisor 831C · Larson Davis · Class 1
- B&K 2270 · HBK (Brüel & Kjær) · Class 1Discontinued
- Svantek SV 977D · Svantek · Class 1
- XPT801 · Delta OHM (Senseca) · Class 1