Hertz Meter Reading Device

In the famous lyics of F. Sinatra, "you can't have one without the other".....

Bob

These are called SPL meters where you can set up the frequency you want to measure the SPL in dB.
If you STILL want to only measure in Hertz than refer to the first post.

It is meaningless to ask "how low it can go" without specifying some number of db that the spl has declined by, relative to the response at some reference frequency (say 1kHz).

A common way of specifying bass rolloff might be something like it is down 3db at 30Hz, relative to 1kHz, and rolls off at 12db/octave below 30Hz.

If you are asking if there is a meter that will tell you at what frequency the response is down by some number of db, the answer is undoubtedly no.

Regards,
-- Al

As the frequency gets lower, you'll notice the volume decreasing as well. There will be a point where the tone is no longer audible. You have just experienced the bass roll off of your system.

As well as the roll-off of your ears, of course, Bob, which may very well be more significant than the system roll-off which you are trying to determine, unless the tones are played at extremely loud volumes. Remember the Fletcher-Munson effect.

Regards,
-- Al