Fire alarm sounder level calculator
Hanapin ang sound level na dapat maabot ng fire alarm system.
Reads NZS 4512:2010. Tables checked 26 Sept 2026.
Subukan ang isang job 6
Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.
- Set the sounder level in a plant roomThe alarm level a sounder must reach over 78 dB of plant noise.
- Set the sounder level in a bedroomThe level at the bedhead in sleeping accommodation.
- Set the level where ear protection is wornWhether a visual device is needed with ear protection.
- Set the level for a voice systemThe level over ambient for a voice alarm.
- Set the level on a balconyThe level a sounder must reach on a balcony.
- Set the level in a quiet officeThe level a sounder must reach over 45 dB of ambient sound.
Mga input
Worked example gamit ang mga default na input.
- Residual sound level (dB)
- 50
- Voice facilities na ginagamit sa evacuation
- Hindi
- Nagbibigay ng tirahan ang gusali
- Hindi
- Balcony na may tao
- Hindi
- Mga ear protector na karaniwang suot
- Hindi
Kinakailangang level (dB LAFmax)
65
- Margin sa itaas ng residual level (dB)
- 5
- Itinakda ng
- 65 dB floor
- Kailangan ang visual alerting device
- Hindi
Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.
Mga hakbang ng kalkulasyon
- Residual sound level, dB50
NZS 4512:2010 Cl 406.3
- Margin sa ibabaw ng residual level, dB5
NZS 4512:2010 Cl 406.3
- Level mula sa margin, dB LAFmax55
NZS 4512:2010 Cl 406.3
- Lower limit na nalalapat, dB LAFmax65
NZS 4512:2010 Cl 406.3
- Kinakailangang level, dB LAFmaxResulta65
NZS 4512:2010 Cl 406.3
- Upper limit, dB LAFmax100
NZS 4512:2010 Cl 406.3
- Taas ng pagsukat1.8m
NZS 4512:2010 Cl 406.3
- Trigger level ng visual device, dB LAeq(10min)90
NZS 4512:2010 Cl 406.4
- Kinakailangan ang visual alerting deviceHindi
NZS 4512:2010 Cl 406.4
- Care area low level sounder, dB sa itaas ng ambient5
NZS 4512:2010 Cl 406.7
Tungkol sa calculator na ito
How this is calculated
The tool finds the sound level a fire alarm sounder must reach. The point is the bed head or the room. It reads NZS 4512:2010 Clause 406.
- Residual level. You enter the ambient level in dB. Cl 406.3 uses it as the base.
- Margin. The tool adds the margin that Cl 406.3 sets for the room. The margin depends on the system type and on sleeping accommodation.
- Lower limit. It reads the floor that applies, such as the floor for sleeping areas. The result is not lower than that floor.
- Upper limit. It reads the ceiling level. The result is not higher than that ceiling.
- Visual device. Cl 406.4 sets a trigger level. Above it, a visual alerting device is also needed.
- Measurement height. The tool gives the height for the reading, from Cl 406.3.
The result is in dB LAFmax.
Worked example
- Office at 50 dB ambient, tone sounder. The margin is 5 dB. The required level is 65 dB LAFmax. The 65 dB floor sets it. A visual alerting device is not required.
Limits
The tool does not count devices. Check Cl 406.6 for that. It does not give the measurement method. A care area has its own rules in Cl 406.7. The tool reads NZS 4512:2010. NZS 4512:2021 supersedes it, so check the current edition.
The result is a design target. Measure the level on site with the method the standard gives, then record it. A tone sounder and a voice sounder can need different levels. Check the entry you pick against the clause.
See also: Detector spacing calculator, Fire alarm cabling and Fire alarm battery.
Mga tanong
Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.
Gaano kalakas dapat ang fire alarm sounder?
Nagtatakda ang NZS 4512:2010 Clause 406.3 ng margin sa ibabaw ng residual sound level. Ang margin ay 10 dB kapag may voice facilities para sa evacuation, at 5 dB kapag wala. Nasa pagitan din ng 65 dB at 100 dB LAFmax ang level. Iniuulat ng AmpSize ang alinmang figure na mas mataas.
Anong level ang kailangan sa bedhead?
Kapag nagbibigay ng accommodation ang gusali, nagbibigay ang Clause 406.3 ng 75 dB LAFmax, na sinusukat sa bedhead. Sakop ng Clause 406.5 at Clause 406.7 ang ibang lugar. I-on ang accommodation option para makita ang bedhead figure.
Kailan kailangan ang visual alerting device?
Binabanggit ng Clause 406.4 ang tatlong kaso. Tinitingnan ng AmpSize ang dalawa sa mga ito: ambient level na higit sa 90 dB LAeq(10min), at ear protectors na regular na suot. Basahin nang buo ang Clause 406.4, dahil may ikatlong kasong hindi tinitingnan ng tool na ito.
Paano sinusukat ang level?
Ibinibigay ng Clause 406.3 ang paraan at ang meter standard. Iniuulat ng AmpSize ang measurement height na 1.8 m. Ang balcony na may tao ay may sarili nitong figure. Basahin nang buo ang Clause 406.3 bago mo itala ang level.
Ipinapakita ba ng tool na ito na sumusunod ang isang system?
Hindi. Iniuulat ng AmpSize ang mga level ng NZS 4512:2010 Clause 406 para sa mga value na ilalagay mo. Gabay ito, hindi desisyon. Sinusuri ang fire alarm design laban sa buong standard at sa idineklarang functional requirements ng gusali.
Mga clause at table na binabasa ng tool na ito
- NZS 4512:2010 Cl 406.3Sound level limits
- NZS 4512:2010 Cl 406.4Visual alerting device trigger
- NZS 4512:2010 Cl 406.6Number of alerting devices
- NZS 4512:2010 Cl 406.7Care area alerting device
- Cl 406Alerting device sound pressure levels
Bawat clause at table, kasama kung paano ito na-verify
Huling na-check ang mga table noong 26 Sept 2026.
Mga kaugnay na tool
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